Delaware County Maps
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Delaware has 3 counties, a population of 989,948 residents, about 68 zip codes and 19 public school districts. Those counties vary widely in population, school enrollment, zip code coverage and local boundary structure. New Castle County has the largest population in the state, while Kent County has the smallest. Browse the map, population, zip codes, school districts and county list sections below to explore further. Or, simply start typing in the box below to go directly to that county.
Interactive Delaware County Map
This Delaware county map preview highlights population-by-county context, ZIP code coverage, school districts, and local boundary structure. Full statewide and county-level data packages are available when you need complete downloadable datasets. Click or tap any county to view its maps, trends and data.
Start with a free preview, or go straight to the full Delaware dataset .
Delaware Population By County
Delaware's population was 989,948 in 2020, up 92,014 (10.25%) residents from 2010. New Castle County had the largest population in the state with 570,719 people. Sussex and Kent Counties also stand out as major population centers. Kent County was the least populated area in Delaware with only 181,851 residents. The table below compares Delaware county populations and recent population trends.
The Most Populated Counties In Delaware
| County | Population | Trend (2010-2020) |
|---|---|---|
| New Castle County | 570,719 | ▴ 5.99% |
| Sussex County | 237,378 | ▴ 20.41% |
| Kent County | 181,851 | ▴ 12.04% |
| Download all county population data | ||
County populations reflect the latest state serving context (2020).
Delaware County Map With ZIP Codes
Delaware has about 68 zip codes statewide. New Castle County contains the most zip codes, with 29. County-level zip code maps give a faster and clearer way to understand local coverage as zip boundaries can span county and municipal lines. The maps below highlight a few Delaware counties.
Delaware School Districts By County
Delaware has 19 public school districts with 128,730 students enrolled as of 2024. Sussex County has the highest district count in the state. New Castle County has the largest total school enrollment. Sussex County posted the largest recent enrollment gain. The table below compares county level school district totals and recent enrollment trends across the state.
Largest School Districts in Delaware
| County | Districts | Enrollment | Trend |
|---|---|---|---|
| Sussex County | 7 | 32,076 | ▴ 0.64% |
| New Castle County | 6 | 65,106 | ▾ 0.91% |
| Kent County | 6 | 31,548 | ▾ 0.16% |
| Download all school district data | |||
School district enrollment and trend values reflect the most recent state-level context (2024).
Get the Full Delaware Data Package
The sections above provide a preview of Delaware county maps and county-level data. The full package includes complete statewide coverage with ready-to-use files for mapping, planning, and analysis.
Everything is organized to save hours of data collection, cleanup, and integration work.
- County map exports and boundary coverage for every county in Delaware
- Statewide GIS layers for ZIP codes, subdivisions, school districts, roads, water, and political boundaries
- Population, demographics, school, housing, and trend context aligned across counties
- Database files, map-ready exports, and documentation designed for faster research workflows
Includes GIS layers, maps, demographics, analytics, database files and planning tools.