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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2023
Mar. 13, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Document Transition Report false    
Entity File Number 0-26486    
Entity registrant name Auburn National Bancorporation, Inc.    
Entity incorporatoin state DE    
Entity tax identification number 63-0885779    
Entity Address Line 1 100 N. Gay Street    
Entity Address city Auburn,    
Entity Address State AL    
Entity Address Postal Zip Code 36830    
City Area Code 334    
Local Phone Number 821-9200    
Entity current reporting status Yes    
Entity filer category Non-accelerated Filer    
Entity Interactive Data Status Current Yes    
entity small business true    
Entity Emerging Growth false    
ICFR Audit Attestation Flag false    
Entity Shell Company false    
Entity common stock shares outstanding   3,493,674  
Entity public float     $ 47,841,697
Entity central index key 0000750574    
Current fiscal year end date --12-31    
Document Year Focus 2023    
Document Period Focus FY    
Amendment flag true    
Entity well known seasoned issuer No    
Entity voluntary filers No    
Security 12B Title Common Stock    
Trading Symbol AUBN    
Security Exchange NASDAQ    
Auditor Name Elliott Davis, LLC    
Auditor Location Greenville, South Carolina    
Auditor Firm ID 149    
Document Fin Stmt Error Correction Flag false    
Amendment Description EXPLANATORY NOTE Auburn National Bancorporation, Inc. (the “Company”) is filing this Amendment No. 1 on Form 10-K/A ( “Amendment No. 1”) to amend the Company’s Annual Report on Form 10-K for the year ended December 31, 2023, which was filed with the United States Securities and Exchange Commission (the “Commission”) on March 14, 2024 (the “Company Form 10-K”). This Amendment No. 1 solely adds Exhibit 97.1 Policy Relating to Recovery of Erroneously Awarded Compensation and updates Item 15(b) and the List of Exhibits previously filed and the related hyperlinks in the originally filed Company Form 10-K to reflect the addition of Exhibit 97.1. The Company and its wholly owned subsidiary, AuburnBank, adopted their Erroneously Awarded Executive Incentive-Based Compensation Recovery Policy included as Exhibit 97.1 effective December 1, 2023