Maryland Citizen Population By County in 2012 (ACS-5Yrs)
Updated on March 28, 2026.
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2012, the citizen population for Maryland was 5,352,685 and represented 92.52% of the total Maryland population.
Among all Maryland counties, Montgomery had the highest citizen population (812.30K), followed by Baltimore (761.20K), and Prince George's (757.33K).
In terms of percentages, Garrett had the highest percentage of its population being citizens (99.37%), followed by Allegany (98.99%), and Calvert (98.99%).
The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.
You can see similar information for other states and by state for the United States.
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Data Source: US Census - ACS 5-Year (CVAP).
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Maryland Citizen Population By County in 2012
Maryland Citizen Population By County in 2012
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| County | Citizen Population | % of County Population |
|---|---|---|
| Montgomery | 812300 | 83.33 |
| Baltimore | 761195 | 94.29 |
| Prince George's | 757330 | 87.51 |
| Baltimore city | 592065 | 95.40 |
| Anne Arundel | 516620 | 95.94 |
| Howard | 265675 | 92.03 |
| Harford | 240485 | 98.00 |
| Frederick | 221945 | 94.74 |
| Carroll | 164815 | 98.54 |
| Washington | 144580 | 97.77 |
| Charles | 143470 | 97.53 |
| St. Mary's | 103950 | 98.50 |
| Cecil | 99600 | 98.51 |
| Wicomico | 94125 | 95.13 |
| Calvert | 87875 | 98.99 |
| Allegany | 73890 | 98.99 |
| Worcester | 50015 | 97.31 |
| Queen Anne's | 47150 | 98.45 |
| Talbot | 36605 | 96.98 |
| Caroline | 31965 | 97.03 |
| Dorchester | 31840 | 97.76 |
| Garrett | 29890 | 99.37 |
| Somerset | 25695 | 97.33 |
| Kent | 19610 | 97.15 |