Document And Entity Information - shares	9 Months Ended
	Mar. 31, 2017	May 10, 2017
Document Information [Line Items]
Entity Registrant Name	CONSUMERS BANCORP INC /OH/
Entity Central Index Key	0001006830
Trading Symbol	cbkm
Current Fiscal Year End Date	--06-30
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		2,724,956
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Amendment Flag	false