Document and Entity Information - shares	6 Months Ended
	Dec. 31, 2019	Feb. 12, 2020
Document and Entity Information [Abstract]
Entity Registrant Name	Kentucky First Federal Bancorp
Entity Central Index Key	0001297341
Amendment Flag	false
Current Fiscal Year End Date	--06-30
Document Type	10-Q
Document Period End Date	Dec. 31, 2019
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2020
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Interactive Data Current	Yes
Entity File Number	0-51176
Entity Shell Company	false
Entity Incorporation State Country Code	KY
Entity Common Stock, Shares Outstanding		8,288,015