EX-4(H) THIRD SUPPLEMENTAL INDENTURE

Exhibit No. 4(H)

THE PROGRESSIVE CORPORATION

and

STATE STREET BANK AND TRUST COMPANY, as

Successor Trustee

THIRD SUPPLEMENTAL INDENTURE

6.375% Senior Notes due 2012

     THIS THIRD SUPPLEMENTAL INDENTURE, dated as of December 7, 2001, between THE PROGRESSIVE CORPORATION, an Ohio corporation (the “ISSUER”) and STATE STREET BANK AND TRUST COMPANY, a Massachusetts trust company (“SSB”), in its capacity as Successor Trustee.

W I T N E S S E T H:

     WHEREAS, the Issuer entered into an Indenture, dated as of September 15, 1993 (as supplemented by the First Supplemental Indenture, dated as of March 15, 1996, the “INDENTURE”), with the First National Bank of Boston, in its capacity as Trustee, pursuant to which the Issuer may from time to time issue its unsecured debentures, notes and other evidences of indebtedness in one or more series; and

     WHEREAS, the Issuer entered into a Supplemental Indenture, dated as of March 15, 1996, confirming the succession of SSB as trustee under the Indenture;

and

     WHEREAS, the Issuer entered into a Second Supplemental Indenture, dated as of February 26, 1999;

     WHEREAS, Article Eight of the Indenture provides for various matters with respect to any series of Securities issued under the Indenture to be established in an indenture supplemental to the Indenture; and

     WHEREAS, Section 8.1(c) of the Indenture provides that the Issuer, when authorized by its Board of Directors, and the Trustee may from time to time and at any time enter into an indenture supplemental to the Indenture to add on to the covenants of the Issuer certain further covenants, restrictions, conditions or provisions.

     NOW THEREFORE:

     In consideration of the premises and other good and valuable consideration, the parties hereto mutually covenant and agree as follows:

ARTICLE 1

RELATION TO INDENTURE; DEFINITIONS

     SECTION 1.01. Integral Part. This Third Supplemental Indenture constitutes an integral part of the Indenture.

     SECTION 1.02. General Definitions. For all purposes of this Third Supplemental Indenture:

     (a) capitalized terms used herein without definition shall have the meanings specified in the Indenture;

     (b) all references herein to Articles and Sections, unless otherwise specified, refer to the corresponding Articles and Sections of this Third Supplemental Indenture; and

     (c) the terms “HEREIN”, “HEREOF”, “HEREUNDER” and other words of similar import refer to this Third Supplemental Indenture.

     SECTION 1.03. Definitions. The following definitions shall apply to this Third Supplemental Indenture:

     “CONSOLIDATED TANGIBLE NET WORTH” means, at any date, the total assets appearing on the consolidated balance sheet of the Issuer and its consolidated subsidiaries as of the end of the then most recent fiscal quarter of the Issuer, prepared in accordance with generally accepted accounting principles, less the sum of (a) the total liabilities appearing on such balance sheet and (b) intangible assets. “INTANGIBLE ASSETS” means, for the purposes of this definition, the value, as shown on or reflected in such balance sheet, of (i) all trade names, trademarks, licenses, patents, copyrights and goodwill, (ii) organizational costs and (iii) unamortized debt discount and expense, less unamortized premium.

     “DESIGNATED SECURITIES” means the series of Securities designated by the Issuer as its “6.375% Senior Notes due 2012”.

     “DESIGNATED SUBSIDIARY” means (i) Progressive Casualty Insurance Company, an Ohio corporation, so long as it remains a subsidiary of the Issuer, (ii) any other consolidated subsidiary of the Issuer the assets of which constitute 10% or more of the Total Assets, and (iii) any subsidiary that is a successor to all or substantially all of the business or properties of any such subsidiary.

     “TOTAL ASSETS” means, at any date, the total assets appearing on the consolidated balance sheet of the Issuer and its consolidated subsidiaries as of the end of the then most recent fiscal quarter of the Issuer, prepared in accordance with generally accepted accounting principles.

ARTICLE 2

ADDITIONAL COVENANTS

     SECTION 2.01. Limitation on Liens. The Issuer will not, nor will it permit any Designated Subsidiary to, incur, issue, assume or guarantee any indebtedness for money borrowed if (i) that indebtedness is secured by a pledge, mortgage, deed of trust or other lien on any shares of stock or indebtedness of any Designated Subsidiary (a “LIEN”), and (ii) the aggregate amount of the indebtedness so secured exceeds an amount equal to 15% of the Issuer’s Consolidated Tangible Net Worth, unless the Designated Securities are also secured equally and ratably with such other indebtedness. For purposes of this restriction, a “LIEN” will not include the pledge to, or deposit with, any state or provincial insurance regulatory authorities of any investment securities by the Issuer or any of its subsidiaries.

     The foregoing restriction shall not apply to indebtedness secured by:

     (a) Liens on any shares of stock or indebtedness of or acquired from a corporation merged or consolidated with or into, or otherwise acquired by, the Issuer or a Designated Subsidiary;

     (b) Liens to secure indebtedness of a Designated Subsidiary to the Issuer or to another Designated Subsidiary, but only as long as such indebtedness is owned or held by the Issuer or a Designated Subsidiary; and

     (c) Any extension, renewal or replacement (or successive extensions, renewals or replacements), in whole or in part, of any lien referred to in (a) and (b).

     SECTION 2.02. Consolidation, Merger, Sale, Conveyance and Lease. The Issuer will not consolidate or merge with or into any other Person or Persons, or sell, convey or lease all or substantially all of its property to any other Person, unless:

     (a) the Person formed by such consolidation, or into which the Issuer is merged or which acquires or leases all or substantially all of the property of the Issuer, is a corporation or other entity organized under the laws of the United States, any state thereof or the District of Columbia, and such Person expressly assumes the Issuer’s obligations under the Designated Securities and the Indenture; and

     (b) immediately after giving effect to the transaction, no Event of Default exists.

     This restriction shall not apply if the Issuer is the Person that survives any such transaction.

         In the event of a conflict between any provision in this Section and any provision in Article 9 of the Indenture, Article 9 of the Indenture shall govern.

ARTICLE 3

MISCELLANEOUS PROVISIONS

     SECTION 3.01. Applicability of this Third Supplemental Indenture. The provisions of this Third Supplemental Indenture will be applicable solely to the Designated Securities.

     SECTION 3.02. Adoption, Ratification and Confirmation. The Indenture, as supplemented by this Third Supplemental Indenture, is in all respects hereby adopted, ratified and confirmed.

     SECTION 3.03. Counterparts. This Third Supplemental Indenture may be executed in any number of counterparts, each of which when so executed shall be deemed an original; and all such counterparts shall together constitute but one and the same instrument.

     SECTION 3.04. GOVERNING LAW. THIS THIRD SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

     IN WITNESS WHEREOF, the parties hereto have caused this Third Supplemental Indenture to be duly executed and their respective corporate seals to be hereunto fixed and attested as of the day and year first written above.

		THE PROGRESSIVE CORPORATION
		By:		/s/ Stephen D. Peterson
				Stephen D. Peterson Treasurer

Attest:
By:		/s/ Charles E. Jarrett
		Charles E. Jarrett Secretary

		STATE STREET BANK AND TRUST       COMPANY, as Successor Trustee
		By:		/s/ Dori Ann Seakas
				Name: Dori Ann Seakas Title: Officer

Attest:
By:		/s/ Patrick E. Thebado
		Name: Patrick E. Thebado Title: Vice President

STATE OF OHIO

                     ss:

COUNTY OF CUYAHOGA

     On this ___th day of December, 2001, before me personally came Stephen D. Peterson, to me personally known, who, being by me duly sworn, did depose and say that he is a resident of Cuyahoga County, Ohio; that he is an officer of THE PROGRESSIVE CORPORATION, one of the corporations described in and which executed the above instrument; that he knows the corporate seal of said corporation; that the seal affixed to said instrument is such corporate seal; that it was so affixed by authority of the Board of Directors of said corporation, and that he signed his name thereto by like authority.

		Notary Public My commission expires:

[Notarial Seal]

STATE OF MASSACHUSETTS                       ss.:
COUNTY OF SUFFOLK

     On this ___th day of December, 2001, before me personally came, to me personally known, who, being by me duly sworn, did depose and say that he is a resident of Bristol County, Massachusetts; that he is an authorized officer of STATE STREET BANK AND TRUST COMPANY, one of the corporations described in and which executed the above instrument; that he knows the corporate seal of said corporation; that the seal affixed to said instruments is such corporate seal; that it was so affixed by authority of the Board of Directors of said corporation, and that he signed her name thereto by like authority.

		Notary Public
		My commission expires:

[Notary Seal]