Promissory Note andCredit Agreement, dated June 11, 2021, by and between Ames National Corporation and Green Belt Bank & Trust, as lender

Exhibit 10.1

PROMISSORY NOTE

PROMISE TO PAY. Ames National Corporation ("Borrower") promises to pay to Green Belt Bank & Trust ("Lender"), or order, in lawful money of the United States of America, the principal amount of Four Million & 00/100 Dollars ($4,000,000.00) or so much as may be outstanding, together with interest on the unpaid outstanding principal balance of each advance. Interest shall be calculated from the date of each advance until repayment of each advance.

PAYMENT. Borrower will pay this loan in accordance with the following payment schedule, which calculates interest on the unpaid principal balances as described in the "INTEREST CALCULATION METHOD" paragraph using the interest rates described in this paragraph: 4 quarterly consecutive interest payments, beginning September 15, 2021, with interest calculated on the unpaid principal balances using an interest rate of 3.350% per annum based on a year of 360 days; 15 quarterly consecutive interest payments, beginning September 15, 2022, with interest calculated on the unpaid principal balances using an interest rate of 3.350% per annum based on a year of 360 days; 15 quarterly consecutive principal payments of $150,000.00 each, beginning September 15, 2022, during which interest continues to accrue on the unpaid principal balances using an interest rate of 3.350% per annum based on a year of 360 days; and one principal and interest payment of $1,764,981.94 on June 15, 2026, with interest calculated on the unpaid principal balances using an interest rate of 3.350% per annum based on a year of 360 days. This estimated final payment is based on the assumption that all payments will be made exactly as scheduled; the actual final payment will be for all principal and accrued interest not yet paid, together with any other unpaid amounts under this Note. Notwithstanding the foregoing, the rate of interest accrual described for the principal only payment stream applies only to the extent that no other interest rate for any other payment stream applies. Unless otherwise agreed or required by applicable law, payments will be applied first to any accrued unpaid interest; then to principal; and then to any late charges.

INTEREST CALCULATION METHOD. Interest on this Note is computed on a 365/360 basis; that is, by applying the ratio of the interest rate over a year of 360 days, multiplied by the outstanding principal balance, multiplied by the actual number of days the principal balance is outstanding. All interest payable under this Note is computed using this method.

RECEIPT OF PAYMENTS. All payments must be made in U.S. dollars and must be received by Lender at:

Green Belt Bank & Trust

Iowa Falls

616 Washington Ave.

P.O. Box 790

Iowa Falls, IA 50126

Payments must be received consistent with the following payment instructions: Payments may be made at any of our Green Belt Bank & Trust locations. Lender may modify these payment instructions, including changing the address for payments, by providing updated payment instructions to Borrower in writing.

PREPAYMENT; MINIMUM INTEREST CHARGE. In any event, even upon full prepayment of this Note, Borrower understands that Lender is entitled to a minimum interest charge of $7.50. Other than Borrower's obligation to pay any minimum interest charge, Borrower may pay without penalty all or a portion of the amount owed earlier than it is due. Early payments will not, unless agreed to by Lender in writing, relieve Borrower of Borrower's obligation to continue to make payments under the payment schedule. Rather, early payments will reduce the principal balance due and may result in Borrower's making fewer payments. Borrower agrees not to send Lender payments marked "paid in full", "without recourse", or similar language. If Borrower sends such a payment, Lender may accept it without losing any of Lender's rights under this Note, and Borrower will remain obligated to pay any further amount owed to Lender. All writ^-ten communications concerning disputed amounts, including any check or other payment instrument that indicates that the payment constitutes "payment in full" of the amount owed or that is tendered with other conditions or limitations or as full satisfaction of a disputed amount must be mailed or delivered to: Green Belt Bank & Trust, Iowa Falls, 616 Washington Ave., P.O. Box 790, Iowa Falls, IA 50126.

LATE CHARGE. If a payment is 11 days or more late, Borrower will be charged 5.000% of the unpaid portion of the regularly scheduled payment or $500.00, whichever is less.

INTEREST AFTER DEFAULT. Upon default, including failure to pay upon final maturity, the total sum due under this Note will continue to accrue interest at the interest rate under this Note, with the final interest rate described in this Note applying after maturity, or after maturity would have occurred had there been no default. However, in no event will the interest rate exceed the maximum interest rate limitations under applicable law.

Page 2

DEFAULT. Each of the following shall constitute an event of default ("Event of Default") under this Note:

Payment Default. Borrower fails to make any payment when due under this Note.

Other Defaults. Borrower fails to comply with or to perform any other term, obligation, covenant or condition contained in this Note or in any of the related documents or to comply with or to perform any term, obligation, covenant or condition contained in any other agreement between Lender and Borrower.

Default in Favor of Third Parties. Borrower or any Grantor defaults under any loan, extension of credit, security agreement, purchase or sales agreement, or any other agreement, in favor of any other creditor or person that may materially affect any of Borrower's property or Borrower's ability to repay this Note or perform Borrower's obligations under this Note or any of the related documents.

False Statements. Any warranty, representation or statement made or furnished to Lender by Borrower or on Borrower's behalf under this Note or the related documents is false or misleading in any material respect, either now or at the time made or furnished or becomes false or misleading at any time thereafter.

Insolvency. The dissolution or termination of Borrower's existence as a going business, the insolvency of Borrower, the appointment of a receiver for any part of Borrower's property, any assignment for the benefit of creditors, any type of creditor workout, or the commencement of any proceeding under any bankruptcy or insolvency laws by or against Borrower.

Creditor or Forfeiture Proceedings. Commencement of foreclosure or forfeiture proceedings, whether by judicial proceeding, self-help, repossession or any other method, by any creditor of Borrower or by any governmental agency against any collateral securing the loan. This includes a garnishment of any of Borrower's accounts, including deposit accounts, with Lender. However, this Event of Default shall not apply if there is a good faith dispute by Borrower as to the validity or reasonableness of the claim which is the basis of the creditor or forfeiture proceeding and if Borrower gives Lender written notice of the creditor or forfeiture proceeding and deposits with Lender monies or a surety bond for the creditor or forfeiture proceeding, in an amount determined by Lender, in its sole discretion, as being an adequate reserve or bond for the dispute.

Events Affecting Guarantor. Any of the preceding events occurs with respect to any guarantor, endorser, surety, or accommodation party of any of the indebtedness or any guarantor, endorser, surety, or accommodation party dies or becomes incompetent, or revokes or disputes the validity of, or liability under, any guaranty of the indebtedness evidenced by this Note.

Change In Ownership. Any change in ownership of twenty-five percent (25%) or more of the common stock of Borrower.

Adverse Change. A material adverse change occurs in Borrower's financial condition, or Lender believes the prospect of payment or performance of this Note is impaired.

Page 3

Insecurity. Lender in good faith believes itself insecure.

Cure Provisions. If any default, other than a default in payment, is curable and if Borrower has not been given a notice of a breach of the same provision of this Note within the preceding twelve (121 months, it may be cured if Borrower, after Lender sends written notice to Borrower demanding cure of such default: (1) cures the default within thirty (30) days; or (2) if the cure requires more than thirty (30) days, immediately initiates steps which Lender deems in Lender's sole discretion to be sufficient to cure the default and thereafter continues and completes all reasonable and necessary steps sufficient to produce compliance as soon as reasonably practical.

LENDER'S RIGHTS. Upon default, Lender may declare the entire unpaid principal balance under this Note and all accrued unpaid interest immediately due, and then Borrower will pay that amount.

ATTORNEYS' FEES; EXPENSES. Lender may hire or pay someone else to help collect this Note if Borrower does not pay. Borrower will pay Lender that amount. This includes, subject to any limits under applicable law, Lender's attorneys' fees and Lender's legal expenses, whether or not there is a lawsuit, including without limitation all attorneys' fees and legal expenses for bankruptcy proceedings (including efforts to modify or vacate any automatic stay or injunction), and appeals. If not prohibited by applicable law, Borrower also will pay any court costs, in addition to all other sums provided by law.

JURY WAIVER. Lender and Borrower hereby waive the right to any jury trial in any action, proceeding, or counterclaim brought by either Lender or Borrower against the other.

GOVERNING LAW. This Note will be governed by federal law applicable to Lender and, to the extent not preempted by federal law, the laws of the State of Iowa without regard to its conflicts of law provisions. This Note has been accepted by Lender in the State of Iowa.

CHOICE OF VENUE. If there is a lawsuit, Borrower agrees upon Lender's request to submit to the jurisdiction of the courts of the State of Iowa, in the county in which Borrower's following address is located: 405 5th Street, Ames, IA 50010.

RIGHT OF SETOFF. To the extent permitted by applicable law, Lender reserves a right of setoff in all Borrower's accounts with Lender (whether checking, savings, or some other account). This includes all accounts Borrower holds jointly with someone else and all accounts Borrower may open in the future. However, this does not include any IRA or Keogh accounts, or any trust accounts for which setoff would be prohibited by law. Borrower authorizes Lender, to the extent permitted by applicable law, to charge or setoff all sums owing on the indebtedness against any and all such accounts, and, at Lender's option, to administratively freeze all such accounts to allow Lender to protect Lender's charge and setoff rights provided in this paragraph.

COLLATERAL. Borrower acknowledges this Note is secured by Real Estate Mortgage dated June 11, 2021 in the amount of $4,000,000.00 on property located at 5625 Mills Civic Parkway, West Des Moines, Polk County, Iowa 50266.

LINE OF CREDIT. This Note evidences a straight line of credit. Once the total amount of principal has been advanced, Borrower is not entitled to further loan advances. Borrower agrees to be liable for all sums either: (A) advanced in accordance with the instructions of an authorized person or (B) credited to any of Borrower's accounts with Lender. The unpaid principal balance owing on this Note at any time may be evidenced by endorsements on this Note or by Lender's internal records, including daily computer print-outs.

LOAN PURPOSE. The purpose of this loan is for Working Capital, Stock Repurchases and Other General Corporate Purposes.

ADDITIONAL PROVISIONS. AVAILABILITY OF PRINCIPAL ADVANCES; CURTAILMENT: Borrower must request advances of undisbursed funds on or before June 15, 2022. Advance of undisbursed funds will be subject to Lender's review and approval. No advance funds will be made after this date, and availability of any undisbursed funds will be cancelled. Prior to this date, Borrower may request any undisbursed funds be advanced on this Note, and be placed in a bank-controlled Escrow account maintained by Lender. Advances made for this purpose will begin to accrue interest at the time of advance. These funds will be held in Escrow until such time as: 1) the funds are used as a principal payment on the Note; or 2) Borrower requests and receives approval from Lender for use of the funds.

SUCCESSOR INTERESTS. The terms of this Note shall be binding upon Borrower, and upon Borrower's heirs, personal representatives, successors and assigns, and shall inure to the benefit of Lender and its successors and assigns.

NOTIFY US OF INACCURATE INFORMATION WE REPORT TO CONSUMER REPORTING AGENCIES. Borrower may notify Lender if Lender reports any inaccurate information about Borrower's account(s) to a consumer reporting agency. Borrower's written notice describing the specific inaccuracy(ies) should be sent to Lender at the following address: Green Belt Bank & Trust 616 Washington Ave Iowa Falls, IA 50126.

GENERAL PROVISIONS. If any part of this Note cannot be enforced, this fact will not affect the rest of the Note. Lender may delay or forgo enforcing any of its rights or remedies under this Note without losing them. Borrower and any other person who signs, guarantees or endorses this Note, to the extent allowed by law, waive presentment, demand for payment, and notice of dishonor. Upon any change in the terms of this Note, and unless otherwise expressly stated in writing, no party who signs this Note, whether as maker, guarantor, accommodation maker or endorser, shall be released from liability. All such parties agree that Lender may renew or extend (repeatedly and for any length of time) this loan or release any party or guarantor or collateral; or impair, fail to realize upon or perfect Lender's security interest in the collateral; and take any other action deemed necessary by Lender without the consent of or notice to anyone. All such parties also agree that Lender may modify this loan without the consent of or notice to anyone other than the party with whom the modification is made. The obligations under this Note are joint and several.

Page 4

PRIOR TO SIGNING THIS NOTE, BORROWER READ AND UNDERSTOOD ALL THE PROVISIONS OF THIS NOTE. BORROWER AGREES TO THE TERMS OF THE NOTE.

BORROWER ACKNOWLEDGES RECEIPT OF A COMPLETED COPY OF THIS PROMISSORY NOTE AND ALL OTHER DOCUMENTS RELATING TO THIS DEBT.

BORROWER:

AMES NATIONAL CORPORATION

LENDER:

GREEN BELT BANK & TRUST

          /s/ Prentice Lee Lofstedt

   Prentice Lee Lofstedt, Vice President/Commercial
   Loans