24 Counties — maryland
| County | Type | Population | Land area |
|---|
| allegany | County | 74,930 | 425 sq mi |
| anne arundel | County | 489,656 | 416 sq mi |
| baltimore | County | 0 | 0 sq mi |
| baltimore city | County | 754,292 | 599 sq mi |
| calvert | County | 74,563 | 215 sq mi |
| caroline | County | 29,772 | 320 sq mi |
| carroll | County | 150,897 | 449 sq mi |
| cecil | County | 85,951 | 348 sq mi |
| charles | County | 120,546 | 461 sq mi |
| dorchester | County | 30,674 | 558 sq mi |
| frederick | County | 195,277 | 663 sq mi |
| garrett | County | 29,846 | 648 sq mi |
| harford | County | 218,590 | 440 sq mi |
| howard | County | 247,842 | 252 sq mi |
| kent | County | 19,197 | 279 sq mi |
| montgomery | County | 873,341 | 495 sq mi |
| prince george | County | 801,515 | 486 sq mi |
| queen anne | County | 40,563 | 372 sq mi |
| somerset | County | 24,747 | 327 sq mi |
| st. mary | County | 86,211 | 361 sq mi |
| talbot | County | 33,812 | 269 sq mi |
| washington | County | 131,923 | 458 sq mi |
| wicomico | County | 84,644 | 377 sq mi |
| worcester | County | 46,543 | 473 sq mi |