Maryland Counties by Population (2026)
2026 Pop.
100K
200K
300K
400K
500K
600K
700K
800K
900K
1M
Top 5 Most Populous Counties
1,076,119
976,152
846,862
605,619
569,941
| County | 2026 Pop. ↓ | Area (mi²) | Density (/mi²) | Change (2020) |
|---|---|---|---|---|
| Montgomery County | 1,076,119 | 493 | 2,183 | 1.43% |
| Prince George's County | 976,152 | 483 | 2,021 | 1.1% |
| Baltimore County | 846,862 | 598 | 1,416 | -0.76% |
| Anne Arundel County | 605,619 | 415 | 1,459 | 2.04% |
| Baltimore city | 569,941 | 81 | 7,036 | -2.29% |
| Howard County | 340,571 | 251 | 1,357 | 2.33% |
| Frederick County | 306,911 | 661 | 464 | 12.52% |
| Harford County | 267,268 | 437 | 612 | 2.31% |
| Charles County | 178,687 | 458 | 390 | 7.17% |
| Carroll County | 176,564 | 448 | 394 | 2.11% |
| Washington County | 158,322 | 458 | 346 | 2.34% |
| St. Mary's County | 117,168 | 359 | 326 | 2.79% |
| Cecil County | 107,695 | 346 | 311 | 3.75% |
| Wicomico County | 107,159 | 374 | 287 | 3.46% |
| Calvert County | 94,347 | 213 | 443 | 1.53% |
| Allegany County | 66,712 | 422 | 158 | -1.85% |
| Queen Anne's County | 55,215 | 372 | 148 | 10.34% |
| Worcester County | 54,537 | 468 | 117 | 3.83% |
| Talbot County | 38,181 | 269 | 142 | 1.85% |
| Caroline County | 34,173 | 319 | 107 | 2.7% |
| Dorchester County | 34,048 | 541 | 63 | 4.69% |
| Garrett County | 28,323 | 649 | 44 | -1.65% |
| Somerset County | 25,193 | 320 | 79 | 2.59% |
| Kent County | 19,613 | 277 | 71 | 2.55% |
Sources
- US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
- US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
- American Community Survey (2009 - 2013)
- Census QuickFacts
- Historical Populations of States and Counties (1790 - 1990)