| Cover | Feb. 03, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 3, 2022 |
| Entity File Number | 0-24047 |
| Entity Registrant Name | GLEN BURNIE BANCORP |
| Entity Central Index Key | 0000890066 |
| Entity Tax Identification Number | 52-1782444 |
| Entity Incorporation, State or Country Code | MD |
| Entity Address, Address Line One | 101 Crain Highway |
| Entity Address, Address Line Two | 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | GLBZ |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
