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Onslow County map

Explore the boundary, see its place in North Carolina, and download a map for your next project.

FIPS 371332025 Census boundariesFree PDF · PNG · SVG
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Boundary map of Onslow County, North Carolina Onslow County
2025 U.S. Census boundaries. Detailed county outline. Zoom or expand for a closer look.
762.1 sq miLand area
143.1 sq miWater area
15.8%Share of area that is water
37133Five-digit county FIPS code

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SVG

SVG is editable vector artwork. PNG is a high-resolution image. PDF uses landscape Letter pages, with a separate key when needed.

Downloads contain the complete boundary map, independent of zoom. Boundary data (GeoJSON) · Reuse with source credit.

Roads, terrain & aerial imagery

Explore Onslow County, North Carolina with a county boundary overlay. Choose a view to load the interactive map.

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Street names, terrain, or aerial photography with the county boundary in view.

Backgrounds load from OpenStreetMap or USGS only when selected. Imagery dates and detail vary by location.

Onslow County at a glance

Onslow County is one of 100 county-level areas in North Carolina. Its 762.1 square miles of land place it at position 12 among those areas by land size. Including 143.1 square miles of water, its mapped total area is approximately 905.2 square miles.

Full Census nameOnslow County
StateNorth Carolina
FIPS / GEOID37133
Boundary vintage2025
Outline source scale1:500,000

Counties along the boundary

These county-level areas share a line segment with Onslow County in the Census cartographic boundary dataset. Select one to continue exploring.

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.