Boundaries: U.S. Census Bureau · Population: Vintage 2024 estimates

Maryland county map

Maryland has 23 counties and the City of Baltimore. Color the ones you've lived in, visited, or passed through, then share your map or download it.

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Pick a category, then click counties. Click again with the same color to clear. Drag to pan, scroll or pinch to zoom.

Every category is yours to change: click its swatch to pick any color, click its name to rename it, and use + Add for up to eight.

Most populous: Montgomery County, 1,082,273. Least populous: Kent County, 19,557.

Largest by land area: Frederick County, 661 square miles.

Maryland borders the District of Columbia, Delaware, Pennsylvania, Virginia, and West Virginia.

Populations are Census Bureau estimates for July 1, 2024.

All 24 counties