Cover - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Mar. 07, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2023
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2023
Current Fiscal Year End Date	--12-31
Entity File Number	333-273901
Entity Registrant Name	BANCORP 34, INC.
Entity Central Index Key	0001668340
Entity Tax Identification Number	74-2819148
Entity Incorporation, State or Country Code	MD
Entity Address, Address Line One	8777 E. Hartford Dive
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Scottsdale
Entity Address, State or Province	AZ
Entity Address, Postal Zip Code	85255
City Area Code	(623)
Local Phone Number	334-6064
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	No
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 Public Float			$ 28,200
Entity Common Stock, Shares Outstanding		3,873,895
Auditor Firm ID	166
Auditor Name	Plante & Moran, PLLC
Auditor Location	Denver, Colorado