Ontario County GIS Maps

Ontario 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.

Ontario County Parcels

Ontario County has 51,317 mapped parcels covering 419,454 acres. The median assessed value is $202,000. The median lot size is 1.90 acres. 7,220 parcels are 10 acres or larger. Of the parcels with a recorded build year, half were built in 1972 or earlier. The records carry 41,819 distinct owner names. About 4% 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 95.3%. Browse the interactive Ontario County Parcel viewer here.

Ontario County Parcel Data Coverage

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

Ontario County Population

Ontario County had 112,458 residents in 2020. That was 4.2% higher than in 2010. Ontario County added 12,234 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 175 people per square mile. Some of the county's most populated postal areas include Canandaigua, Geneva and Victor.

Population Trend in Ontario County NY

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

Ontario County Zip Codes

Ontario County has 19 zip codes. Some of the county's most populated zip codes include Canandaigua (14424), Geneva (14456) and Victor (14564). Canandaigua is the largest zip by population, with about 28,353 residents or 25% of the county total. Together, the three largest zips account for about 57% of all county residents based on 2020 population estimates.

Most Populated Zip Codes in Ontario County NY

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

Ontario County Demographics

Ontario County has a median age of 43.9, which makes the county a little older than New York overall. About 19.5% of residents are under 18, while 21.5% 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 28.2% of the population, which points to a solid working-age base. About 37.2% 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 Ontario County NY

Ontario County School Districts

Ontario County is served by 15 public school districts with 27,581 students enrolled in 2024. The largest districts on the county map are Pittsford Central, Victor Central and Canandaigua City. Those three districts account for about 47% 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 Ontario County NY

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

Ontario County Housing & Real Estate

Ontario County has a median home value of $202,900 and a median gross rent of $1,126. About 73% 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 $468,500 and homes spent about 43 days on the market.

Businesses in Ontario County, NY

Ontario County has 6,646 business listings across 751 categories. The largest categories in Ontario County business listings are Game Publisher (335, 5.0%), Professional Services (118, 1.8%), and Financial Service (105, 1.6%). The full Ontario County business listings dataset includes names, categories, addresses and contact details where available. Ontario County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.

Top Business Categories in Ontario County, NY

Ontario County Business Listings

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

Ontario County Basemaps

Ontario 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.