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Document and Entity Information
Jul. 01, 2025
Cover [Abstract]  
Document Type 8-K
Document Period End Date Jul. 01, 2025
Entity Registrant Name AUBURN NATIONAL BANCORPORATION, INC
Entity Incorporation State Country Code DE
Entity File Number 0-26486
Entity Tax Identification Number 63-0885779
Entity Address Address Line 1 100 North Gay Street
Entity Address Address Line 2 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
Current Fiscal Year End Date --12-31
Entity Central Index Key 0000750574
Amendment Flag false