The list is the FIPS codes of Maryland counties. All the FIPS codes are starting with 24.
| County | FIPS Code |
| Allegany | 24001 |
| Anne Arundel | 24003 |
| Baltimore | 24005 |
| Baltimore City | 24510 |
| Calvert | 24009 |
| Caroline | 24011 |
| Carroll | 24013 |
| Cecil | 24015 |
| Charles | 24017 |
| Dorchester | 24019 |
| Frederick | 24021 |
| Garrett | 24023 |
| Harford | 24025 |
| Howard | 24027 |
| Kent | 24029 |
| Montgomery | 24031 |
| Prince Georges | 24033 |
| Queen Annes | 24035 |
| Somerset | 24039 |
| St Marys | 24037 |
| Talbot | 24041 |
| Washington | 24043 |
| Wicomico | 24045 |
| Worcester | 24047 |
All codes are cited from United States Department of Agriculture [28].