47 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hagerstown | 1 | 43,573 | 43,523 | 0.02% | 3,422 | 12.73 | City |
| Halfway | 2 | 10,101 | 10,804 | -0.39% | 2,313 | 4.37 | CDP |
| Robinwood | 3 | 8,273 | 7,482 | 1.1% | 2,174 | 3.81 | CDP |
| Fountainhead-Orchard Hills | 4 | 6,331 | 5,964 | 0.7% | 1,434 | 4.42 | CDP |
| St. James | 5 | 4,394 | 3,567 | 2.23% | 727 | 6.04 | CDP |
| Boonsboro | 6 | 3,839 | 3,799 | 0.21% | 1,257 | 3.05 | Town |
| Smithsburg | 7 | 3,257 | 2,986 | 1.69% | 2,805 | 1.16 | Town |
| Paramount-Long Meadow | 8 | 2,851 | 2,834 | 0.67% | 1,307 | 2.18 | CDP |
| Maugansville | 9 | 2,695 | 2,148 | -0.92% | 1,101 | 2.45 | CDP |
| Williamsport | 10 | 2,090 | 2,079 | 0.1% | 2,126 | 0.98 | Town |
| Hancock | 11 | 1,559 | 1,553 | 0.06% | 524 | 2.98 | Town |
| Wilson-Conococheague | 12 | 1,547 | 2,014 | -3.07% | 328 | 4.72 | CDP |
| Keedysville | 13 | 1,219 | 1,213 | 0.08% | 1,441 | 0.85 | Town |
| Downsville | 14 | 1,059 | 863 | 4.64% | 1,694 | 0.63 | CDP |
| Funkstown | 15 | 853 | 850 | 0.12% | 1,529 | 0.56 | Town |
| Cavetown | 16 | 849 | 1,104 | -4.71% | 446 | 1.90 | CDP |
| Bagtown | 17 | 568 | 400 | 2.9% | 1,040 | 0.55 | CDP |
| Sharpsburg | 18 | 565 | 562 | 0.18% | 2,545 | 0.22 | Town |
| Fairplay | 19 | 534 | 470 | -0.56% | 444 | 1.20 | CDP |
| Pinesburg | 20 | 526 | 255 | 0.96% | 719 | 0.73 | CDP |
| Beaver Creek | 21 | 465 | 539 | 3.33% | 405 | 1.15 | CDP |
| Tilghmanton | 22 | 462 | 355 | -0.22% | 996 | 0.46 | CDP |
| Mount Aetna | 23 | 415 | 599 | -2.12% | 294 | 1.41 | CDP |
| Mercersville | 24 | 370 | 188 | 4.52% | 1,146 | 0.32 | CDP |
| Clear Spring | 25 | 369 | 371 | 0% | 3,050 | 0.12 | Town |
| Charlton | 26 | 361 | 380 | 3.74% | 2,215 | 0.16 | CDP |
| San Mar | 27 | 345 | 318 | -0.86% | 740 | 0.47 | CDP |
| Leitersburg | 28 | 300 | 386 | -5.96% | 171 | 1.75 | CDP |
| Mount Lena | 29 | 300 | 355 | -4.46% | 239 | 1.25 | CDP |
| Chewsville | 30 | 268 | 301 | 0.75% | 321 | 0.83 | CDP |
| Trego-Rohrersville Station | 31 | 263 | 101 | 2.33% | 617 | 0.43 | CDP |
| Mapleville | 32 | 260 | 308 | 0.39% | 645 | 0.40 | CDP |
| Rohrersville | 33 | 210 | 280 | 0.96% | 607 | 0.35 | CDP |
| Breathedsville | 34 | 200 | 281 | -1.96% | 538 | 0.37 | CDP |
| Dargan | 35 | 195 | 202 | 1.04% | 661 | 0.29 | CDP |
| Pondsville | 36 | 186 | 39 | 1.09% | 602 | 0.31 | CDP |
| Mount Briar | 37 | 179 | 117 | 0.56% | 287 | 0.62 | CDP |
| Cearfoss | 38 | 139 | 115 | -2.11% | 692 | 0.20 | CDP |
| Jugtown | 39 | 127 | 240 | -3.79% | 380 | 0.33 | CDP |
| Pecktonville | 40 | 110 | 287 | -2.65% | 187 | 0.59 | CDP |
| Antietam | 41 | 75 | 45 | 7.14% | 490 | 0.15 | CDP |
| Ringgold | 42 | 57 | 90 | -10.94% | 198 | 0.29 | CDP |
| Big Pool | 43 | 50 | 85 | 6.38% | 463 | 0.11 | CDP |
| Big Spring | 44 | 29 | 50 | 7.41% | 209 | 0.14 | CDP |
| Ernstville | 45 | 25 | 25 | 8.7% | 168 | 0.15 | CDP |
| Brownsville | 46 | 15 | 26 | 7.14% | 53 | 0.28 | CDP |
| Indian Springs | 47 | 14 | 18 | 7.69% | 121 | 0.12 | CDP |
Hagerstown is the largest city in Washington County, with a population of 43,573.
Indian Springs is the smallest city in Washington County.
There are 47 cities in Washington County, Maryland.