Maryland Counties by Population (2026)
2026 Pop.
100K
200K
300K
400K
500K
600K
700K
800K
900K
1M
1.1M
Top 5 Most Populous Counties
1,108,025
986,821
859,923
607,120
569,779
24 Counties
| County | 2026 Pop. ↓ | Area (mi²) | Density | Change (2020) |
|---|---|---|---|---|
| Montgomery County | 1,108,025 | 493 | 2,248 | 4.45% |
| Prince George's County | 986,821 | 483 | 2,043 | 2.22% |
| Baltimore County | 859,923 | 598 | 1,438 | 0.77% |
| Anne Arundel County | 607,120 | 415 | 1,463 | 2.31% |
| Baltimore city | 569,779 | 81 | 7,034 | -2.3% |
| Howard County | 344,322 | 251 | 1,372 | 3.46% |
| Frederick County | 309,643 | 661 | 468 | 13.51% |
| Harford County | 267,000 | 437 | 611 | 2.2% |
| Charles County | 178,898 | 458 | 391 | 7.32% |
| Carroll County | 177,854 | 448 | 397 | 2.86% |
| Washington County | 159,452 | 458 | 348 | 3.09% |
| St. Mary's County | 118,449 | 359 | 330 | 3.9% |
| Wicomico County | 107,817 | 374 | 288 | 4.11% |
| Cecil County | 107,563 | 346 | 311 | 3.62% |
| Calvert County | 95,083 | 213 | 446 | 2.33% |
| Allegany County | 66,699 | 422 | 158 | -1.84% |
| Queen Anne's County | 55,700 | 372 | 150 | 11.33% |
| Worcester County | 54,553 | 468 | 117 | 3.87% |
| Talbot County | 38,598 | 269 | 143 | 2.87% |
| Caroline County | 35,068 | 319 | 110 | 5.38% |
| Dorchester County | 33,570 | 541 | 62 | 3.22% |
| Garrett County | 28,175 | 649 | 43 | -2.16% |
| Somerset County | 25,635 | 320 | 80 | 4.35% |
| Kent County | 19,789 | 277 | 71 | 3.48% |
Overview of Maryland Counties
There are 24 counties in Maryland.
Montgomery County is the largest county in the state, with a population of 1,108,025. The most recent census shows that its population has increased by 0.04% since the previous census.
A number of other Maryland counties also boast relatively large populations for their state, though not able to match the density of Montgomery County:
- Prince George's County : 986,821
- Baltimore County : 859,923
Maryland Counties with the Fewest Residents
The smallest county in Maryland is Kent County , with a population of just 19,789. This total represents a increase of 0.0% since the last census count was performed.
Other small counties include:
- Somerset County : 25,635
- Garrett County : 28,175
- Dorchester County : 33,570
Maryland Counties with Rapid Growth
Frederick County , with its sizeable population of 309,643, has shown the largest population growth, with an increase of 0.1% since the last census.
Montgomery County has also had relatively high population growth of 0.04% with 1,108,025 residents.
On the other hand, Baltimore city has had the largest decrease in population, with its 569,779 current residents totalling 0.0% less than the previous census.
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)