v3.26.3
Document And Entity Information
Nov. 10, 2026
Document Information [Line Items]  
Entity, Registrant Name AUBURN NATIONAL BANCORPORATION, INC.
Document, Type 8-K
Document, Period End Date Nov. 10, 2026
Entity, Incorporation, State or Country Code DE
Entity, File Number 0-26486
Entity, Tax Identification Number 63-0885779
Entity, Address, Address Line One 100 North Gay Street, P.O. Drawer 3110
Entity, Address, City or Town Auburn
Entity, Address, State or Province AL
Entity, Address, Postal Zip Code 36831
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
Title of 12(b) Security Common Stock
Trading Symbol AUBN
Security Exchange Name NASDAQ
Entity, Emerging Growth Company false
Amendment Flag false
Entity, Central Index Key 0000750574