| 1 | Braddock Heights CDP (east) | 7,628 |
| 2 | Monrovia CDP (northeast) | 7,500 |
| 3 | Adamstown CDP (north-northwest) | 7,432 |
| 4 | Monrovia CDP (south-southwest) | 7,276 |
| 5 | Urbana CDP (west) | 6,592 |
| 6 | Frederick city (north-northwest) | 6,506 |
| 7 | Walkersville town (west-southwest) | 6,359 |
| 8 | Frederick city (north-northeast) | 6,299 |
| 9 | Frederick city (northeast) | 5,978 |
| 10 | Ballenger Creek CDP (south-southeast) | 5,894 |
| 11 | Ballenger Creek CDP (south-southwest) | 5,737 |
| 12 | Spring Ridge CDP (south) | 5,720 |
| 13 | Rosemont village | 5,676 |
| 14 | Spring Ridge CDP (north) | 5,667 |
| 15 | Lewistown CDP (south-southwest) | 5,637 |
| 16 | Burkittsville town | 5,557 |
| 17 | Braddock Heights CDP (southeast) | 5,446 |
| 18 | Frederick city (south) | 5,444 |
| 19 | New Market town | 5,441 |
| 20 | Mount Airy town | 5,369 |
| 21 | Emmitsburg town (north-northwest) | 5,364 |
| 22 | Braddock Heights CDP (east-northeast) | 5,287 |
| 23 | Walkersville town (north) | 5,284 |
| 24 | Sabillasville CDP (southeast) | 5,089 |
| 25 | Bartonsville CDP | 4,822 |
| 26 | Ballenger Creek CDP (west-southwest) | 4,759 |
| 27 | Braddock Heights CDP (northwest) | 4,609 |
| 28 | Middletown town | 4,526 |
| 29 | Frederick city (east) | 4,523 |
| 30 | Walkersville town (northeast) | 4,491 |
| 31 | Walkersville town (south) | 4,420 |
| 32 | Adamstown CDP (southwest) | 4,412 |
| 33 | Frederick city (south-southwest) | 4,377 |
| 34 | Linganore CDP (northwest) | 4,299 |
| 35 | Frederick city (southwest) | 4,290 |
| 36 | Libertytown CDP (southeast) | 4,021 |
| 37 | Urbana CDP (east) | 4,017 |
| 38 | Myersville town (west) | 3,905 |
| 39 | Brunswick city | 3,828 |
| 40 | Libertytown CDP (east-northeast) | 3,821 |
| 41 | Myersville town (south-southeast) | 3,817 |
| 42 | Monrovia CDP (west) | 3,754 |
| 43 | Monrovia CDP (south-southeast) | 3,653 |
| 44 | Woodsboro town | 3,490 |
| 45 | Point of Rocks CDP (south) | 3,452 |
| 46 | Lewistown CDP (north-northeast) | 3,247 |
| 47 | Sabillasville CDP (northwest) | 3,152 |
| 48 | Walkersville town (south-southwest) | 3,070 |
| 49 | Libertytown CDP (north) | 2,880 |
| 50 | Frederick city (southeast) | 2,848 |
| 51 | Ballenger Creek CDP (north-northeast) | 2,802 |
| 52 | Point of Rocks CDP (west-southwest) | 2,698 |
| 53 | Libertytown CDP (west-southwest) | 2,666 |
| 54 | Emmitsburg town (south-southeast) | 2,529 |
| 55 | Thurmont town | 2,443 |
| 56 | Adamstown CDP (southeast) | 2,341 |
| 57 | Linganore CDP (southeast) | 2,330 |
| 58 | Myersville town (north) | 2,263 |
| 59 | Braddock Heights CDP (west-southwest) | 2,189 |
| 60 | Frederick city (west) | 2,181 |
| 61 | Point of Rocks CDP (northeast) | 2,073 |
| 62 | Ballenger Creek CDP (north-northwest 2) | 1,992 |
| 63 | Ballenger Creek CDP (east-northeast) | 1,800 |
| 64 | Ballenger Creek CDP (north-northwest 1) | 1,698 |
| 65 | Ballenger Creek CDP (west-northwest) | 1,671 |