Northumberland County GIS Maps

Northumberland 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.

Northumberland County Population

Northumberland County had 91,647 residents in 2020. That was 3% lower than in 2010. Northumberland County had 2,909 fewer people in 2020 than it did in 2000, which points to a long-term population decline. Sunbury is the largest city in the county, but it accounts for only about 11% of the total population. The county is fairly spread out, with about 200 people per square mile. Some of the county's most populated postal areas include Sunbury, Milton and Shamokin.

Population Trend in Northumberland County PA

Northumberland County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.

Northumberland County Zip Codes

Northumberland County has 22 zip codes. Some of the county's most populated zip codes include Sunbury (17801), Milton (17847) and Shamokin (17866). Sunbury is the largest zip by population, with about 16,332 residents or 18% of the county total. Together, the three largest zips account for about 42% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Northumberland County PA

Northumberland County Zip Code populations and trends per most recent census data.

Northumberland County Demographics

Northumberland County has a median age of 44.4, which makes the county a little older than Pennsylvania overall. About 19.8% of residents are under 18, while 21.7% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 30.1% of the population, which points to a solid working-age base. About 19.2% of adults have a bachelor's degree or higher, above the statewide figure of 34.5%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.

Key Demographics for Northumberland County PA

Northumberland County School Districts

Northumberland County is served by 8 public school districts with 13,986 students enrolled in 2024. The largest districts on the county map are Shikellamy, Shamokin Area and Danville Area. Those three districts account for about 50% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.

Largest School Districts by Enrollment in Northumberland County PA

Northumberland County school district enrollment and trends per most recent NCES reporting data.

Northumberland County Housing & Real Estate

Northumberland County has a median home value of $151,600 and a median gross rent of $777. About 75% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Pennsylvania median, while rents come in below the state average. In March 2026, the median listing price was $125,200 and homes spent about 56 days on the market.

Businesses in Northumberland County, PA

Northumberland County has 3,256 business listings across 539 categories. The largest categories in Northumberland County business listings are Churches & Religious Organizations (139, 4.3%), Auto Repair (80, 2.5%), and Beauty Salons (60, 1.8%). The full Northumberland County business listings dataset includes names, categories, addresses and contact details where available. Northumberland County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Northumberland County, PA

Northumberland County Business Listings

Northumberland County business listings sourced from Overture Maps. Includes locations with a high level of confidence.

Northumberland County Basemaps

Northumberland 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.

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 Pennsylvania — explore the full structure before you buy.