Oswego County GIS Maps

Oswego 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.

Oswego County Parcels

Oswego County has 59,567 mapped parcels covering 605,846 acres. The median assessed value is $90,000. The median lot size is 3.60 acres. 10,801 parcels are 10 acres or larger. Of the parcels with a recorded build year, half were built in 1965 or earlier. The records carry 45,861 distinct owner names. About 5% of parcels list an owner mailing address outside New York. Owner names, site addresses, assessed values and lot sizes are on nearly every parcel. Mailing addresses reach 93.9%. Browse the interactive Oswego County Parcel viewer here.

Oswego County Parcel Data Coverage

Field coverage measured across all Oswego County parcel records. Download free sample data here.

Oswego County Population

Oswego County had 117,525 residents in 2020. That was 3.8% lower than in 2010. Oswego County had 4,852 fewer people in 2020 than it did in 2000, which points to a long-term population decline. The county is fairly spread out, with about 123 people per square mile. Some of the county's most populated postal areas include Oswego, Fulton and Central Square.

Population Trend in Oswego County NY

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

Oswego County Zip Codes

Oswego County has 22 zip codes. Some of the county's most populated zip codes include Oswego (13126), Fulton (13069) and Central Square (13036). Oswego is the largest zip by population, with about 35,477 residents or 30% of the county total. Together, the three largest zips account for about 58% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Oswego County NY

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

Oswego County Demographics

Oswego County has a median age of 40.6, which makes the county a little older than New York overall. About 20.7% of residents are under 18, while 17.4% 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 28.7% of the population, which points to a solid working-age base. About 21.9% of adults have a bachelor's degree or higher, above the statewide figure of 39.6%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.

Key Demographics for Oswego County NY

Oswego County School Districts

Oswego County is served by 9 public school districts with 17,488 students enrolled in 2024. The largest districts on the county map are Oswego City, Central Square Central and Fulton City. Those three districts account for about 57% 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 Oswego County NY

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

Oswego County Housing & Real Estate

Oswego County has a median home value of $139,600 and a median gross rent of $943. About 74% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the New York median, while rents come in below the state average. In March 2026, the median listing price was $251,150 and homes spent about 92 days on the market.

Businesses in Oswego County, NY

Oswego County has 4,211 business listings across 605 categories. The largest categories in Oswego County business listings are Churches & Religious Organizations (116, 2.8%), Auto Repair (109, 2.6%), and Farm (69, 1.6%). The full Oswego County business listings dataset includes names, categories, addresses and contact details where available. Oswego County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Oswego County, NY

Oswego County Business Listings

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

Oswego County Basemaps

Oswego 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 New York — explore the full structure before you buy.