[Form of Senior Fixed Rate Medium-Term Note] (FACE OF SECURITY)

EXHIBIT 4.2

[Form of Senior Fixed Rate Medium-Term Note]

(FACE OF SECURITY)

THIS SECURITY IS AN UNSECURED SENIOR DEBT OBLIGATION OF ZIONS BANCORPORATION. THIS SECURITY IS NOT A DEPOSIT OR SAVINGS ACCOUNT AND IS NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY OTHER GOVERNMENTAL AGENCY OR INSTRUMENTALITY.

[IF A GLOBAL SECURITY, INSERT—THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.]

[IF DTC IS THE DEPOSITARY, INSERT— UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO ZIONS BANCORPORATION OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

[INSERT ANY LEGEND REQUIRED BY THE INTERNAL REVENUE CODE AND THE REGULATIONS THEREUNDER.]

CUSIP NO.

NO.

ZIONS BANCORPORATION

SENIOR

MEDIUM–TERM NOTE

SERIES A

(Fixed Rate)

The following terms apply to this Security, as and to the extent shown below:

* This date shall be the issue date of this Security, unless there is a Predecessor Security, in which case this date shall be the issue date of the first Predecessor Security.

Terms left blank or marked “N/A”, “No”, “None” or in a similar manner do not apply to this Security except as otherwise may be specified.

Whenever used in this Security, the terms specified above that apply to this Security have the meanings specified above, unless the context requires otherwise. Other terms used in this Security that are not defined herein but that are defined in the Indenture referred to on the reverse of this Security are used herein as defined therein.

Zions Bancorporation, a corporation duly organized and existing under the laws of the State of Utah (hereinafter called the “Company”, which term includes any successor Person under the Indenture), for value received, hereby promises to pay to                                         , or registered assigns, as principal the Principal Amount hereof on the Stated Maturity specified on the face hereof, and to pay interest thereon, from the Original Issue Date specified on the face hereof or from the most recent Interest Payment Date to which interest has been paid or duly provided for, on the Interest Payment Date(s) in each year, commencing on the first such date that is at least 15 calendar days after the Original Issue Date, and at the Stated Maturity of the principal hereof, at the rate per annum equal to the Interest Rate specified on the face hereof, until the principal hereof is paid or made available for payment. Any premium and any such installment of interest that is overdue at any time shall also bear interest (to the extent that the payment of such interest shall be legally enforceable), at the rate per annum at which the principal then bears interest from the date any such overdue amount first becomes due until it is paid or duly made available for payment. Notwithstanding the foregoing, interest on any principal, premium or installment of interest that is overdue shall be payable on demand.

Interest on this Security shall be computed on the basis of a 360-day year of twelve 30-day months. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in the Indenture, be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date on the face hereof for such interest (whether or not a Business Day, as the case may be) prior to each Interest Payment Date. Any such interest not punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Regular Record Date and may either be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Securities of this series not less than 10 days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in such Indenture. Notwithstanding the foregoing, interest payable on this Security at the Stated Maturity will be payable to the person to whom principal is payable unless the Stated Maturity, Redemption Date or Repayment Date is an Interest Payment Date.

MANNER OF PAYMENT

Payment of the principal of (and premium, if any) and any such interest on this Security will be made at the office or agency of the Company maintained for that purpose in Salt Lake City, Utah in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided, however, that, at the option of the Company payment of interest may be made by check mailed to the address of the Person entitled thereto as such address shall appear in the Security Register.

Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place.

Unless the certificate of authentication hereon has been executed by or on behalf of The Bank of New York Trust Company, N.A., the Trustee under the Indenture or its successors thereunder, by manual signature, this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed.

Dated:

This is one of the Securities of the series designated herein and referred to in the Indenture.

(REVERSE OF SECURITY)

This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”) issued and to be issued in one or more series under an Indenture, dated as of September 10, 2002 (herein called the “Indenture”, which term shall have the meaning assigned to it in such instrument), between the Company and The Bank of New York Trust Company, N.A., as successor to J.P. Morgan Trust Company, National Association, as Trustee (herein called the “Trustee”, which term includes any successor trustee under the Indenture), and reference is hereby made to the Indenture for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered.

This Security is one of the series designated on the face hereof, limited in aggregate principal amount to $                     which amount may be increased at the option of the Company if in the future it determines that it may wish to sell additional Securities of this series. References herein to “this series” means the series of securities designated on the face hereof.

Unless a Redemption Date is specified on the face hereof, this Security shall not be redeemable at the option of the Company before the Stated Maturity. If a Redemption Date is so specified, and unless otherwise specified on the face hereof, this Security is subject to redemption, in whole or from time to time in part in increments of $1,000, upon not less than 30 days’ nor more than 60 days’ notice at any time and from time to time on or after the Redemption Date, in each case as a whole or in part, at the election of the Company and at the applicable Redemption Price specified on the face hereof (expressed as a percentage of the principal amount of this Security to be redeemed), together with accrued interest to the Redemption Date, but interest installments due on or prior to such Redemption Date will be payable to the Holder of this Security, or one or more Predecessor Securities, of record at the close of business on the relevant record date, all as provided in the Indenture.

If this Security is a Global Security, in the event of redemption of this Global Security in part only, a new Global Security or Securities of this series and of like tenor for the unredeemed portion of the principal hereof will be delivered to the Depositary upon the cancellation hereof.

Unless a Repayment Date is specified on the face hereof, this Security will not be subject to repayment at the option of the Holder. Except as otherwise may be provided on the face hereof, if one or more Repayment Dates are specified on the face hereof, this Security will be repayable in whole or in part in an amount equal to $1,000 or an integral multiple thereof (provided that the remaining principal amount of any Security surrendered for partial repayment shall at least equal $1,000 or an integral multiple thereof), on any such Repayment Date, in each case at the option of the Holder and at the applicable Repayment Price specified on the face hereof (expressed as a percentage of the principal amount to be repaid), together with accrued interest to the applicable Repayment Date (but interest installments due on or prior to such Repayment Date will be payable to the Holder of this Security, or one or more Predecessor Securities, of record at the close of business on the relevant record rate, as provided in the Indenture). If this Security provides for more than one Repayment Date and the Holder exercises its option to elect repayment, the Holder shall be deemed to have elected repayment on the earliest Repayment Date after all conditions to such exercise have been satisfied, and references herein to the “applicable Repayment Date” shall mean such earliest Repayment Date.

In order for the exercise of such option to be effective and this Security to be repaid, the Company must receive at the applicable address of the Trustee set forth below (or at such other place or places of which the Company shall from time to time notify the Holder of this Security), on any Business Day not later than the 15th, and not earlier than the 25th, calendar day prior to the applicable Repayment Date (or, if either such calendar day is not a Business Day, the next succeeding Business Day), either (i) this Security, with the form below entitled “Option to Elect Repayment” duly completed and signed, or (ii) a telegram, telex, facsimile transmission or letter from a member of a national securities exchange or the Financial Industry Regulatory Authority, a commercial bank or a trust company in the United States of America setting forth (a) the name, address and telephone number of the Holder of this Security, (b) the principal amount of this Security and the amount of this Security to be repaid, (c) a statement that the option to elect repayment is being exercised thereby and (d) a guarantee stating that the Company will receive this Security, with the form below entitled “Option to Elect Repayment” duly completed and signed, not later than five Business Days after the date of such telegram, telex, facsimile transmission or letter (provided that this Security and form duly completed and signed are received by the Company by such fifth Business Day). Any such election shall be irrevocable. The address to which such deliveries are to be made is Zions First National Bank, Attention: Corporate Trust Department, One South Main St., 12th Floor, Salt Lake City, UT 84111 (or at such other places as the Company or the Trustee shall notify the Holder of this Security). All questions as to the validity, eligibility (including time of receipt) and acceptance of any Security for repayment will be determined by the Company, whose determination will be final and binding. Notwithstanding the foregoing, (x) if this Security is a Global Security, the option of the Holder to elect repayment may be exercised in accordance with the applicable procedures of the Depositary for this Security at least 15 calendar days prior to the applicable Repayment Date and (y) whether or not this Security is a Global Security, the option of the Holder to elect repayment may be exercised in any such manner as the Company may approve.

Unless otherwise specified on the face hereof, there is no sinking fund for the Securities of this series.

The Indenture contains provisions for defeasance at any time of the entire indebtedness of this Security or certain restrictive covenants and Events of Default with respect to this Security, in each case upon compliance with certain conditions set forth in the Indenture. If so specified on the face hereof, either or both of such provisions are applicable to this Security, as so specified.

If the Security is not an Original Issue Discount Security, and if an Event of Default with respect to Securities of this series shall occur and be continuing, the principal of the Securities of this series may be declared due and payable in the manner and with the effect provided in the Indenture.

If the Security is an Original Issue Discount Security, and if an Event of Default with respect to the Securities of this series shall occur and be continuing, an amount of principal of the Securities of this series may be declared due and payable in the manner and with the effect provided in the Indenture. Such amount shall be calculated in accordance with the formula specified on the face hereof. Upon payment (i) of the amount of principal so declared due and payable and (ii) of interest on any overdue principal, premium and interest (in each case to the extent that the payment of such interest shall be legally enforceable), all of the Company’s obligations in respect of the payment of the principal of and premium interest, if any, on the Securities of this series shall terminate.

The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series to be affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders of 66 ²/₃% in principal amount of the Securities at the time Outstanding of each series to be affected. The Indenture also contains provisions permitting the Holders of specified percentages in principal amount of the Securities of each series at the time Outstanding, on behalf of the Holders of all Securities of such series, to waive compliance by the Company with certain provisions of the Indenture and certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Holder of this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer hereof or in exchange herefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Security.

As provided in and subject to the provisions of the Indenture, the Holder of this Security shall not have the right to institute any proceeding with respect to the Indenture or for the appointment of a receiver or trustee or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice of a continuing Event of Default with respect to the Securities of this series, the Holders of not less than 25% in principal amount of the Securities of this series at the time Outstanding shall have made written request to the Trustee to institute proceedings in respect of such Event of Default as Trustee and offered the Trustee reasonable indemnity, and the Trustee shall not have received from the Holders of a majority in principal amount of Securities of this series at the time Outstanding a direction inconsistent with such request, and shall have failed to institute any such proceeding, for 60 days after receipt of such notice, request and offer of indemnity. The foregoing shall not apply to any suit instituted by the Holder of this Security for the enforcement of any payment of principal hereof or any premium or interest hereon on or after the respective due dates expressed herein.

No reference herein to the Indenture and no provision of this Security or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of (and premium, if any) and interest on this Security at the times, place and rate, and in the coin or currency, herein prescribed.

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Security is registrable in the Security Register, upon surrender of this Security for registration of transfer at the office or agency of the Company in any place where the principal of and any premium and interest on this Security are payable, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Securities of this series and of like tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

The Securities of this series are issuable only in registered form without coupons in denominations of $1,000 and any integral multiple thereof. As provided in the Indenture and subject to certain limitations therein set forth, Securities of this series are exchangeable for a like aggregate principal amount of Securities of this series and of like tenor of a different authorized denomination, as requested by the Holder surrendering the same.

No service charge shall be made for any such registration of transfer or exchange of Securities, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Prior to due presentment of this Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Security is registered as the owner hereof for all purposes, whether or not this Security be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.

This Security shall be governed by and construed in accordance with the laws of the State of New York, but without regard to principles or conflicts of laws.

All terms used in this Security which are defined in the Indenture shall have the meanings assigned to them in the Indenture.

ABBREVIATIONS

The following abbreviations, when used in the inscription on the face of this Security, shall be construed as though they were written out in full according to applicable laws or regulations.

TEN COM — as tenants in common

TEN ENT — as tenants by the entireties

JT TEN — as joint tenants with the right of survivorship and not as tenants in common

Additional abbreviations may also be used though not in the above list.

OPTION TO ELECT REPAYMENT

TO BE COMPLETED ONLY IF THIS SECURITY IS REPAYABLE

AT THE OPTION OF THE HOLDER AND THE HOLDER

ELECTS TO EXERCISE SUCH RIGHT

The undersigned hereby irrevocably requests and instructs the Company to repay the Security referred to in this notice (or the portion thereof specified below) at the applicable Repayment Price, together with interest to the Repayment Date, all as provided for in such Security, to the undersigned, whose name, address and telephone number are as follows:

(please print name of the undersigned)

(please print address of the undersigned)

(please print telephone number of the undersigned)

If such Security provides for more than one Repayment Date, the undersigned requests repayment on the earliest Repayment Date after the requirements for exercising this option have been satisfied, and references in this notice to the Repayment Date mean such earliest Repayment Date. Terms used in this notice that are defined in such Security are used herein as defined therein.

For such Security to be repaid the Company must receive at the applicable address of the Trustee set forth below or at such other place or places of which the Company shall from time to time notify the Holder of such Security, on any Business Day not later than the 30th or earlier than the 60th calendar day prior to the Repayment Date (or, if either such calendar day is not a Business Day, the next succeeding Business Day), (i) such Security, with this “Option to Elect Repayment” form duly completed and signed, or (ii) a telegram, telex, facsimile transmission or letter from a member of a national securities exchange or the Financial Industry Regulatory Authority, a commercial bank or a trust company in the United States of America setting forth (a) the name, address and telephone number of the Holder of such Security, (b) the principal amount of such Security and the amount of such Security to be repaid, (c) a statement that the option to elect repayment is being exercised thereby and (d) a guarantee stating that such Security to be repaid with the form entitled “Option to Elect Repayment” on the addendum to the Security duly completed and signed will be received by the Company not later than five Business Days after the date of such telegram, telex, facsimile transmission or letter (provided that such Security and form duly completed and signed are received by the Company by such fifth Business Day). The address to which such deliveries are to be made is:

Zions First National Bank

Attention: Corporate Trust Department

One South Main Street, 12th Floor

Salt Lake City, UT 84111

or at such other place as the Company or the Trustee shall notify the holder of such Security.

If less than the entire principal amount of such Security is to be repaid, specify the portion thereof (which shall equal at least $1,000 or an integral multiple thereof) that the Holder elects to have repaid:

and specify the denomination or denominations (which shall equal at least $1,000 or an integral multiple thereof) of the Security or Securities to be issued to the Holder in respect of the portion of such Security not being repaid (in the absence of any specification, one Security will be issued in respect of the portion not being repaid):

ASSIGNMENT

FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and transfer(s) unto

PLEASE INSERT SOCIAL SECURITY OR OTHER

IDENTIFYING NUMBER OF ASSIGNEE

(Please Print or Typewrite Name and Address Including Postal Zip Code of Assignee) the attached Security and all rights thereunder, and hereby irrevocably constitutes and appoints

to transfer said Security on the books of the Company, with full power of substitution in the premises.