Population of Counties in Maryland (2024)

CSV JSON

Download Table Data

County	2024 Population	Growth Since 2020	Area (mi²)	Density (/mi²)
Montgomery County	1,063,881	0.28%	493	2,158
Prince George's County	947,880	-1.81%	483	1,962
Baltimore County	843,420	-1.17%	598	1,410
Anne Arundel County	595,817	1.14%	415	1,436
Baltimore city	561,371	-3.74%	81	6,931
Howard County	336,636	1.15%	251	1,341
Frederick County	299,242	9.7%	661	453
Harford County	265,473	1.62%	437	607
Carroll County	177,806	2.81%	448	397
Charles County	173,835	4.25%	458	380
Washington County	156,369	1.08%	458	341
St. Mary's County	115,779	1.56%	359	323
Cecil County	106,474	2.58%	346	308
Wicomico County	105,114	1.5%	374	281
Calvert County	94,897	2.13%	213	446
Allegany County	67,280	-1%	422	159
Worcester County	54,408	3.59%	468	116
Queen Anne's County	53,296	6.52%	372	143
Talbot County	37,832	0.92%	269	141
Caroline County	33,759	1.47%	319	106
Dorchester County	33,175	1.98%	541	61
Garrett County	28,258	-1.88%	649	44
Somerset County	25,212	2.65%	320	79
Kent County	19,311	1%	277	70

There are 24 counties in Maryland. In 2019, the most populous county in Maryland is Montgomery County, adjacent to Washington, D.C. and one of America's most affluent counties, with a population of 1,058,810. This represents population growth of 8.47% since the 2010 census. Other populous counties in Maryland include Prince George's County (912,756), Baltimore County (832,468), Baltimore city (611,648), Anne Arundel County (573,235). These are the only Maryland counties with a population of more than 500,000. All five counties have experienced positive population growth since the last census except Baltimore city, which has a population that has declined by 1.51%.

Maryland Counties with Fewest Residents

The least populated county in Maryland is Kent County with 19,384 residents. Since the last census, Kent County's population has grown by -4.07%. Following Kent County, the least populated counties in Maryland include Somerset County (25,918), Garrett County (29,233), Dorchester County (32,162), Caroline County (33,193), and Talbot County (37,103). These are the only counties below 40,000 residents. All six counties have experienced negative population growth except Caroline County, which has grown very modestly by 0.41%.

Maryland Counties with Rapid Growth

Howard County has experienced the highest population growth in Maryland since the last census with a growth rate of 11.26% to a total 2019 population of 321,113. Other counties that have posted population growth of more than 5% since the 2010 census include Charles County (8.53%), Montgomery County (8.47%), Frederick County (7.62%), and St. Mary's County (6.53%). The county that has experienced the most significant decline is Allegany County with -4.48% growth since the census.