| Document and Entity Information | Apr. 24, 2024 |
| Cover [Abstract] | |
| Entity Registrant Name | AUBURN NATIONAL BANCORPORATION, INC |
| Amendment Flag | false |
| Entity Central Index Key | 0000750574 |
| Document Type | 8-K |
| Document Period End Date | Apr. 24, 2024 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 0-26486 |
| Entity Tax Identification Number | 63-0885779 |
| Entity Address, Address Line One | 100 North Gay Street |
| Entity Address, Address Line Two | P.O. Drawer 3110 |
| Entity Address, City or Town | Auburn |
| Entity Address, State or Province | AL |
| Entity Address, Postal Zip Code | 36831-3110 |
| City Area Code | (334) |
| Local Phone Number | 821-9200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.01 |
| Trading Symbol | AUBN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
