Baltimore County at a glance
Baltimore County is one of 24 county-level areas in Maryland. Its 598.4 square miles of land place it at position 3 among those areas by land size. Including 83.4 square miles of water, its mapped total area is approximately 681.8 square miles.
| Full Census name | Baltimore County |
|---|---|
| State | Maryland |
| FIPS / GEOID | 24005 |
| Boundary vintage | 2025 |
| Outline source scale | 1:500,000 |
Counties along the boundary
These county-level areas share a line segment with Baltimore County in the Census cartographic boundary dataset. Select one to continue exploring.
- Anne Arundel CountyMaryland
- Carroll CountyMaryland
- Harford CountyMaryland
- Howard CountyMaryland
- Baltimore cityMaryland
- York CountyPennsylvania
Looking for another Baltimore County?
The short name “Baltimore” also appears elsewhere. The state and FIPS code distinguish this area.
Using this map
Choose a blank outline for coloring or a labelled download for reference. SVG preserves editable boundary artwork, PNG works in slides, and PDF provides a ready-to-print landscape page. Use the full state map to compare surrounding counties.
Roads, topography, and aerial imagery are available in the interactive background viewer. Those backgrounds have their own dates and sources; the red boundary overlay follows the 2025 Census geography.
Sources and precision
U.S. Census Bureau, 2025 Cartographic Boundary Files. The county outline uses the 1:500,000 file; location maps and interactive overlays use 1:5,000,000. Areas come from ALAND and AWATER, converted to square miles and rounded to one decimal place. Neighbor links are calculated from shared boundary segments, not from point-only contacts. Generalized maps are for geographic reference, not parcel or legal boundary determination. Full methodology.