Maryland County Maps
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Maryland has 24 counties, a population of more than 6 million people, about 477 zip codes and 24 public school districts. Those counties vary widely in population, school enrollment, zip code coverage and local boundary structure. Montgomery County has the largest population in the state, while Kent County has the smallest. Browse the map, population, zip codes, school districts, county subdivisions and county list sections below to explore further. Or, simply start typing in the box below to go directly to that county.
Interactive Maryland County Map
This Maryland county map preview highlights population-by-county context, ZIP code coverage, school districts, and local boundary structure. Full statewide and county-level data packages are available when you need complete downloadable datasets. Click or tap any county to view its maps, trends and data.
Start with a free preview, or go straight to the full Maryland dataset .
Maryland Population By County
Maryland's population was over 6 million in 2020, up 434,808 (8.44%) residents from 2010. Montgomery County had the largest population in the state with more than 1 million people. Prince George's and Baltimore Counties also stand out as major population centers. Kent County was the least populated area in Maryland with only 19,198 residents. The table below compares Maryland county populations and recent population trends.
The Most Populated Counties In Maryland
| County | Population | Trend (2010-2020) |
|---|---|---|
| Montgomery County | 1,062,061 | ▴ 9.29% |
| Prince George's County | 967,201 | ▴ 12.02% |
| Baltimore County | 854,535 | ▴ 6.15% |
| Anne Arundel County | 588,261 | ▴ 9.41% |
| Howard County | 328,200 | ▴ 14.32% |
| Download all county population data | ||
County populations reflect the latest state serving context (2020).
Maryland County Map With ZIP Codes
Maryland has about 477 zip codes statewide. Montgomery County contains the most zip codes, with 48. County-level zip code maps give a faster and clearer way to understand local coverage as zip boundaries can span county and municipal lines. The maps below highlight a few Maryland counties.
Maryland School Districts By County
Maryland has 24 public school districts with 891,130 students enrolled as of 2024. Montgomery County stands out for both district count and total enrollment. Baltimore County posted the largest recent enrollment gain. The table below compares county level school district totals and recent enrollment trends across the state.
Largest School Districts in Maryland
| County | Districts | Enrollment | Trend |
|---|---|---|---|
| Montgomery County | 1 | 159,181 | ▾ 0.65% |
| Prince George's County | 1 | 132,123 | ▴ 0.62% |
| Baltimore County | 1 | 110,024 | ▾ 0.23% |
| Anne Arundel County | 1 | 85,029 | ▴ 0.81% |
| Baltimore County | 1 | 76,807 | ▴ 1.31% |
| Download all school district data | |||
School district enrollment and trend values reflect the most recent state-level context (2024).
Maryland County Map With County Subdivisions
Maryland has about 290 county subdivisions statewide. These boundaries add another layer of local detail and help show how subdivision lines fit inside county boundaries. The previews below highlight a few counties with available subdivision map coverage.
Get the Full Maryland Data Package
The sections above provide a preview of Maryland county maps and county-level data. The full package includes complete statewide coverage with ready-to-use files for mapping, planning, and analysis.
Everything is organized to save hours of data collection, cleanup, and integration work.
- County map exports and boundary coverage for every county in Maryland
- Statewide GIS layers for ZIP codes, subdivisions, school districts, roads, water, and political boundaries
- Population, demographics, school, housing, and trend context aligned across counties
- Database files, map-ready exports, and documentation designed for faster research workflows
Includes GIS layers, maps, demographics, analytics, database files and planning tools.