Cover Page - shares	9 Months Ended
	Sep. 30, 2025	Nov. 10, 2025
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2025
Document Transition Report	false
Entity File Number	001-38956
Entity Registrant Name	RICHMOND MUTUAL BANCORPORATION, INC.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	36-4926041
Entity Address, Address Line One	31 North 9th Street
Entity Address, City or Town	Richmond
Entity Address, State or Province	IN
Entity Address, Postal Zip Code	47374
City Area Code	765
Local Phone Number	962-2581
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	RMBI
Security Exchange Name	NASDAQ
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
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		10,450,007
Registrant CIK	0001767837
Fiscal Year End	--12-31
Amendment Flag	false
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q3