Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 21, 2021	Jun. 30, 2020
Cover [Abstract]
Entity Registrant Name	GLEN BURNIE BANCORP
Entity Well-Known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Central Index Key	0000890066
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Shell Company	false
ICFR Auditor Attestation Flag	false
Entity Common Stock Shares Outstanding		2,845,103
Document Type	10-K
Document Period End Date	Dec. 31, 2020
Entity Interactive Data Current	Yes
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Public Float			$ 19,147,937