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Population Review

Census ACS 2023 · 24 counties

Largest Counties in Maryland

Maryland has 24 counties with Census data available. The largest is Montgomery County with a population of 1,057,586. County-level data is important because counties are the primary unit of local government in most states, responsible for courts, elections, public health, and infrastructure. Population distribution across counties reveals where growth is concentrated and where rural decline may be occurring.

Source: Census ACS 2023 5-Year Estimates

#CountyPopulationMedian Income
1Worcester County53,279$81,455
2Wicomico County104,117$72,861
3Washington County155,033$74,157
4Talbot County37,707$84,378
5St. Mary's County114,372$114,580
6Somerset County24,685$52,462
7Queen Anne's County50,951$113,347
8Prince George's County955,584$100,708
9Montgomery County1,057,586$128,733
10Kent County19,265$74,402
11Howard County333,916$146,982
12Harford County262,509$111,317
13Garrett County28,713$69,031
14Frederick County280,341$120,458
15Dorchester County32,612$60,495
16Charles County168,710$120,592
17Cecil County104,366$91,146
18Carroll County174,318$115,876
19Caroline County33,406$66,368
20Calvert County93,791$132,059
21Baltimore County849,586$90,904
22Baltimore city577,193$59,623
23Anne Arundel County590,936$120,324
24Allegany County67,762$57,393

More Rankings for Maryland

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Frequently Asked Questions

Montgomery County is the #1 ranked county in Maryland by population, with a value of 1,057,586 according to Census ACS 2023 data.

Maryland has 24 counties tracked in Census ACS 2023 data.

All data comes from the American Community Survey (ACS) 2023 5-Year estimates by the US Census Bureau.

Sources: US Census Bureau ACS 2023 5-Year Estimates

Data from the American Community Survey 2023 5-Year estimates. Covers all counties in Maryland.