Sussex County GIS Maps
Sussex County, Delaware, has 237,378 residents and covers 936.1 square miles. The population grew 20.4% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Sussex County is 10005.
Milford is the county's largest population center. Sussex County also includes 22 zip codes, 7 public school districts and 21 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers and sample data. Paid packages add full layers, analytics and database files.
Sussex County Trends
- Population
- 237,378▴
- Median Home Value
- $353,300▴
- K-12 Enrollment
- 32,076▴
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Sussex County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Sussex County Population
Sussex County had 237,378 residents in 2020. That was 20.4% higher than in 2010. Sussex County added 80,740 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 254 people per square mile. Some of the county's most populated postal areas include Millsboro, Lewes and Seaford.
Population Trend in Sussex County DE
Sussex County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Sussex County Zip Codes
Sussex County has 22 zip codes. Some of the county's most populated zip codes include Millsboro (19966), Lewes (19958) and Seaford (19973). Millsboro is the largest zip by population, with about 32,520 residents or 14% of the county total. Together, the three largest zips account for about 36% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Sussex County DE
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 19966 | Millsboro | 32,520 | ▴ 32.2% |
| 19958 | Lewes | 27,911 | ▴ 42% |
| 19973 | Seaford | 25,550 | ▴ 7.2% |
| 19947 | Georgetown | 20,964 | ▴ 11.5% |
| 19963 | Milford | 20,827 | ▴ 8.4% |
| Download all zip code data | |||
Sussex County Zip Code populations and trends per most recent census data.
Sussex County Demographics
Sussex County has a median age of 51.4, which makes the county a little older than Delaware overall. About 18.3% of residents are under 18, while 29.5% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 65 and over at about 29.5% of the population, which points to an older population profile. About 32.6% of adults have a bachelor's degree or higher, above the statewide figure of 35.3%. The county is majority White by population, with Hispanic, Asian, Black and multiracial residents making up a meaningful share of the local mix.
Key Demographics for Sussex County DE
Median Age
51.4
Under 18
18.3%
Age 65+
29.5%
Bachelor's+
32.6%
Sussex County School Districts
Sussex County is served by 7 public school districts with 32,076 students enrolled in 2024. The largest districts on the county map are Indian River, Cape Henlopen and Milford. Those three districts account for about 68% of public school enrollment in the map area. Total enrollment has grown modestly since 2017 across the districts shown on the county map.
Largest School Districts by Enrollment in Sussex County DE
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Indian River School District | 10,753 | 33.5% | ▾ -0.3% |
| Cape Henlopen School District | 6,654 | 20.7% | ▴ 1% |
| Milford School District | 4,523 | 14.1% | ▾ -1.6% |
| Seaford School District | 3,580 | 11.2% | ▴ 4.8% |
| Woodbridge School District | 2,577 | 8% | ▴ 2.8% |
| Download all school district data | |||
Sussex County school district enrollment and trends per most recent NCES reporting data.
Sussex County Housing & Real Estate
Sussex County has a median home value of $353,300 and a median gross rent of $1,221. About 81% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run above the Delaware median, while rents come in below the state average. In March 2026, the median listing price was $555,000 and homes spent about 58 days on the market.
Sussex County Housing Mix
Sussex County housing mix: owner, renter and vacant units.
Sussex County Housing Trends
Sussex County median home value and rent trend (last 5 years).
Businesses in Sussex County, DE
Sussex County has 11,431 business listings across 875 categories. The largest categories in Sussex County business listings are Real Estate Agents (320, 2.8%), Churches & Religious Organizations (304, 2.7%), and Contractors (212, 1.9%). The full Sussex County business listings dataset includes names, categories, addresses and contact details where available. Sussex County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Sussex County, DE
| Category | Businesses | Share |
|---|---|---|
| Real Estate Agents | 320 | 2.8% |
| Churches & Religious Organizations | 304 | 2.7% |
| Contractors | 212 | 1.9% |
| ATMs | 206 | 1.8% |
| Beach | 154 | 1.3% |
| Landmark And Historical Building | 153 | 1.3% |
| Restaurants | 139 | 1.2% |
| Auto Repair | 128 | 1.1% |
| Real Estate | 115 | 1.0% |
| Parks & Recreation | 106 | 0.9% |
Sussex County Business Listings
| Business | Category | City |
|---|---|---|
| AMS of Delaware | Abuse And Addiction Treatment | Rehoboth Beach |
| Milton Abbey | Accommodation | Milton |
| Faw Casson CPA | Accountant | Rehoboth Beach |
| Jays Nest | Active Life | Seaford |
| Delaware Family Acupuncture | Acupuncture | Milton |
| BrightView Georgetown, DE Addiction Treatment Center | Addiction Rehabilitation Center | Georgetown |
| Party in the USA | Adult Entertainment | Lewes |
| Outdoor Cover Warehouse | Adventure Sports Center | Laurel |
| Nexo 212 LLC | Advertising Agency | Lewes |
| Allen Harim | Agricultural Cooperatives | Millsboro |
| Download Sussex County business listings | ||
Sussex County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Sussex County Basemaps
Sussex County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Sussex County Data Package
This page shows a preview of what's included in the Sussex County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
One-time · instant download · 30-day refund guarantee · See full package details
Preview a Live Package Demo
See exactly what is included in a county data package. Inspect how files are organized, the interactive data explorer and how maps and analytics are laid out. The demo loads a real sample package from Delaware — explore the full structure before you buy.
No email or download required. Opens in a preview window on this page.
Nearby Counties
Browse county data pages for the counties that border Sussex County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.