New Castle, DE GIS Map
New Castle is a city in New Castle County, Delaware, with a population of about 5,285. The map below shows its location, boundary and surrounding roads, with federal GIS layers you can turn on for the area.
- County
- New Castle County
- Population
- 5,285
- Elevation
- 11 ft
- Coordinates
- 39.6620, -75.5663
- ZIP codes (3)
- 19720, 19721, 19726
- Land area
- 3.5 sq mi
- Time zone
- America/New York
About New Castle, DE
New Castle is a city in New Castle County, Delaware, United States. The city is located six miles (10 km) south of Wilmington and is situated on the Delaware River. As of 2020, the city's population was 5,551. New Castle constitutes part of the Philadelphia metropolitan area.
Source: Wikipedia (CC BY-SA 4.0)
Cities Near New Castle
- Bear, DE5 mi
- Wilmington, DE6 mi
- Elsmere, DE6 mi
- Pike Creek, DE8 mi
- Newark, DE10 mi
- Claymont, DE11 mi
- Hockessin, DE11 mi
- Elkton, MD15 mi
Other Cities in New Castle County
GIS Data for New Castle, DE
The New Castle map loads live federal GIS layers in your browser, so you can check flood zones, terrain, land cover and district boundaries for any address in New Castle without a separate GIS login. Everything below is drawn from public U.S. government data.
Layers you can turn on
FEMA flood zones
National Flood Hazard Layer — flood insurance rate map zones.
Elevation contours and hillshade
USGS 3DEP terrain, so you can read slope and relief.
Land cover
NLCD land cover classes — forest, developed, wetland, water.
School districts
Census TIGER unified and elementary school district boundaries.
ZIP code and county boundaries
Census TIGER ZCTA and county boundary lines.
Map tools
Measure distance and area
Draw a line or polygon to get length in miles or area in acres.
Sketch and annotate
Add points, lines and shapes on top of the map.
Inspect any point
Click the map to read coordinates, elevation and the layers under your cursor.
Download the map
Save the current view as a PNG image.
New Castle Demographics
Source: U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates.
Population
5,579
Households
2,774
Median household income
$89,205
Median age
48.5 years
Median home value
$285,100
Median gross rent
$1,739/mo
Owner-occupied homes
63.4%
Bachelor's degree or higher
33.8%
Below poverty level
4.7%
Land area
3.5 sq mi
Population density
1,604 / sq mi
County
ZIP codes in New Castle
New Castle Population Growth
Source: U.S. Census Bureau, 2010 Census and Population Estimates Program (Vintage 2024: April 2020 estimates base and July 1, 2024 estimate).
2010 Census
5,285
April 2020 (estimates base)
5,552
July 2024 estimate
5,715
Change 2010-2020
+5.1%
Change 2020-2024
+2.9%
Federal Buildings & Leases in New Castle
GSA-managed federal properties in and around New Castle.
| Property | Address | Status | Sq ft | Lease ends |
|---|---|---|---|---|
| Creekwood Office Complex III | 920 W Basin Rd, 19720 | Leased | 30,015 | Nov 2030 |
| Southgate New Castle | 23 Southgate Blvd, 19720 | Leased | 10,488 | May 2029 |
| Churchman's Center New Castle | 908 Churchmans Rd Ext 908c, 19720 | Leased | 6,472 | Jun 2034 |
| New Castle County Airport | 151 N Dupont Hwy, 19720 | Leased | 89 | Feb 2030 |
Source: U.S. GSA Inventory of Owned and Leased Properties (data.gov), September 2026.
Soils of New Castle
General soil map unit at the city center: Woodstown-Sassafras-Matapeake-Fallsington-Elkton
Soil Properties
- Drainage class
- Poorly drained
- Hydrologic soil group
- B (moderate infiltration)
- Available water storage (0–150 cm)
- 22.1 cm
- Typical slope
- 4%
- Flooding frequency
- None
- Min. annual water table depth
- 77 cm
Soil Components
- Woodstown19%
Ultisols · Aquic Hapludults
- Sassafras15%
Ultisols · Typic Hapludults
- Matapeake12%
Ultisols · Typic Hapludults
- Elkton9%
Ultisols · Typic Endoaquults
- Fallsington8%
Ultisols · Typic Endoaquults
- Keyport6%
Ultisols · Aquic Hapludults
Source: USDA NRCS U.S. General Soil Map (STATSGO2). General soil map data (1:250,000 scale) is not suitable for site-specific decisions.
Climate of New Castle
30-year averages (1991–2020) from the Wilmington New Castle Co Ap, De weather station, elevation 79 ft, 2 miles from the city center.
Warmest month
Jul · avg high 87°F
Coldest month
Jan · avg low 26°F
Annual precipitation
45.3 in
Annual snowfall
20.2 in
Average Monthly Temperatures (°F)
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 41 | 44 | 52 | 64 | 74 | 82 | 87 | 85 | 78 | 67 | 56 | 46 |
| Avg low °F | 26 | 27 | 34 | 44 | 53 | 63 | 68 | 67 | 59 | 47 | 37 | 30 |
| Precip. in | 3.23 | 2.83 | 4.16 | 3.51 | 3.57 | 4.67 | 4.41 | 3.98 | 4.38 | 3.68 | 3.06 | 3.85 |
| Snow in | 6.1 | 7.8 | 3.1 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 2.9 |
Source: NOAA NCEI U.S. Climate Normals, 1991–2020. Conditions at the station may differ from other parts of the city.
Natural Hazard Risk in New Castle
FEMA National Risk Index ratings for New Castle County, compared with all U.S. counties.
Overall risk
Score 95.3 of 100
Expected annual loss
Buildings, population & agriculture
Social vulnerability
Susceptibility to hazard impacts
Community resilience
Ability to prepare & recover
Risk by Hazard
- Winter WeatherVery High
- Inland FloodingRelatively High
- Heat WaveRelatively Moderate
- Cold WaveRelatively High
- EarthquakeRelatively Moderate
- Ice StormRelatively High
- HurricaneRelatively Moderate
- Strong WindRelatively High
- TornadoRelatively Moderate
- DroughtRelatively Moderate
- Coastal FloodingRelatively High
- LightningRelatively Moderate
- LandslideRelatively Low
- WildfireVery Low
- HailVery Low
Source: FEMA National Risk Index (December 2025 release). County-level ratings are relative to other U.S. counties and are not a property-specific assessment.
New Castle FAQ
What county is New Castle in?
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New Castle, Delaware is located in New Castle County.
What is the population of New Castle?
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New Castle has a population of about 5,285, making it the number 14 of the 21 Delaware cities listed on GIS Map.
What is the elevation of New Castle?
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The elevation of New Castle is approximately 11 feet (3 meters) above sea level at the city center.
What ZIP codes are in New Castle?
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ZIP codes for New Castle include 19720, 19721, 19726.
What time zone is New Castle in?
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New Castle is in the Eastern Time zone (America/New York).
How far is New Castle from Dover?
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New Castle is about 35 miles from Dover, the capital of Delaware, in a straight line.
How far is New Castle from Wilmington?
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New Castle is about 6 miles from Wilmington, the largest city in Delaware listed on GIS Map, in a straight line.
What cities are near New Castle?
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Cities near New Castle include Bear, DE (5 miles); Wilmington, DE (6 miles); Elsmere, DE (6 miles); Pike Creek, DE (8 miles); Newark, DE (10 miles).
Local notes for New Castle, DE
Questions and local knowledge from people who know the area. Every note is read before it appears here.