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Delaware · County atlas

New Castle County map

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

FIPS 100032025 Census boundariesFree PDF · PNG · SVG
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Boundary map of New Castle County, Delaware New Castle County
2025 U.S. Census boundaries. Detailed county outline. Zoom or expand for a closer look.
426.3 sq miLand area
67.7 sq miWater area
13.7%Share of area that is water
10003Five-digit county FIPS code

Download this map

Choose a format for printing, editing, or sharing. All downloads are free.

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 New Castle County, Delaware 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.

New Castle County at a glance

New Castle County is one of 3 county-level areas in Delaware. Its 426.3 square miles of land place it at position 3 among those areas by land size. Including 67.7 square miles of water, its mapped total area is approximately 494 square miles.

Full Census nameNew Castle County
StateDelaware
FIPS / GEOID10003
Boundary vintage2025
Outline source scale1:500,000

Counties along the boundary

These county-level areas share a line segment with New Castle 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.