Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2023	Feb. 28, 2024	Jun. 30, 2023
Document Information [Line Items]
Entity Central Index Key	0000921183
Entity Registrant Name	HMN FINANCIAL INC
Amendment Flag	true
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2023
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity File Number	0-24100
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	41-1777397
Entity Address, Address Line One	1016 Civic Center Drive Northwest
Entity Address, Postal Zip Code	55901
Entity Address, City or Town	Rochester
Entity Address, State or Province	MN
City Area Code	507
Local Phone Number	535-1200
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	HMNF
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 67,900,000
Entity Common Stock, Shares Outstanding		4,462,555
Amendment Description	HMN Financial, Inc. is filing this Form 10-K/A as Amendment No. 1 (the Amended Filing) to its Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (the Original Filing) that was filed with the Securities and Exchange Commission on March 15, 2024 to correct (i) Baker Tilly US, LLP's report of independent registered public accounting firm, as a previously superseded version was filed due to a clerical error, and (ii) to add Exhibit 21.   This Amended Filing does not reflect any subsequent events occurring after the original filing date of the Original Filing and does not modify or update in any way disclosures made in the Original Filing except as described above.
Auditor Firm ID	23
Auditor Name	Baker Tilly US, LLP
Auditor Location	Milwaukee, Wisconsin