Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 03, 2021
Cover
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2021
Entity File Number	0-24047
Entity Registrant Name	GLEN BURNIE BANCORP
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	52-1782444
Entity Address, Address Line One	101 Crain Highway, S.E.
Entity Address, City or Town	Glen Burnie
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	21061
City Area Code	410
Local Phone Number	766-3300
Entity Central Index Key	0000890066
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Shell Company	false
Title of 12(b) Security	Common Stock, par value $1.00 per share
Trading Symbol	GLBZ
Security Exchange Name	NASDAQ
Entity Common Stock Shares Outstanding		2,853,880
Document Type	10-Q
Entity Interactive Data Current	Yes
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Small Business	true
Entity Emerging Growth Company	false