Seneca County GIS Maps
Seneca County, New York, has 33,814 residents and covers 323.7 square miles. The population declined 4.1% between the 2010 and 2020 census. More residents left than arrived over that decade. The FIPS code for Seneca County is 36099.
Waterloo is the county's largest population center. Seneca County also includes 8 zip codes, 8 public school districts and 28 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.
Seneca County Trends
- Population
- 33,814▾
- Median Home Value
- $142,700▴
- K-12 Enrollment
- 8,142▾
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.
Seneca 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.
Seneca County Population
Seneca County had 33,814 residents in 2020. That was 4.1% lower than in 2010. Seneca County added 472 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 104 people per square mile. Some of the county's most populated postal areas include Seneca Falls, Waterloo and Ovid.
Population Trend in Seneca County NY
Seneca County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Seneca County Zip Codes
Seneca County has 8 zip codes. Some of the county's most populated zip codes include Seneca Falls (13148), Waterloo (13165) and Ovid (14521). Seneca Falls is the largest zip by population, with about 10,541 residents or 31% of the county total. Together, the three largest zips account for about 72% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Seneca County NY
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 13148 | Seneca Falls | 10,541 | ▾ -1.9% |
| 13165 | Waterloo | 10,354 | ▾ -3.6% |
| 14521 | Ovid | 3,473 | ▴ 25.8% |
| 14541 | Romulus | 3,298 | ▾ -20.1% |
| 14847 | Interlaken | 2,443 | ▴ 1.9% |
| Download all zip code data | |||
Seneca County Zip Code populations and trends per most recent census data.
Seneca County Demographics
Seneca County has a median age of 42.8, which makes the county a little older than New York overall. About 20.5% of residents are under 18, while 20.8% 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% of the population, which points to a solid working-age base. About 24.1% 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 Seneca County NY
Median Age
42.8
Under 18
20.5%
Age 65+
20.8%
Bachelor's+
24.1%
Seneca County School Districts
Seneca County is served by 8 public school districts with 8,142 students enrolled in 2024. The largest districts on the county map are Geneva City, Waterloo Central and Seneca Falls Central. Those three districts account for about 56% 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 Seneca County NY
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Geneva City School District | 1,963 | 24.1% | ▾ -1.7% |
| Waterloo Central School District | 1,414 | 17.4% | ▴ 1.6% |
| Seneca Falls Central School District | 1,156 | 14.2% | ▾ -2% |
| Trumansburg Central School District | 957 | 11.8% | ▾ -0.5% |
| Lyons Central School District | 917 | 11.3% | ▴ 5.3% |
| Download all school district data | |||
Seneca County school district enrollment and trends per most recent NCES reporting data.
Seneca County Housing & Real Estate
Seneca County has a median home value of $142,700 and a median gross rent of $925. About 72% 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 $249,450 and homes spent about 85 days on the market.
Seneca County Housing Mix
Seneca County housing mix: owner, renter and vacant units.
Seneca County Housing Trends
Seneca County median home value and rent trend (last 5 years).
Businesses in Seneca County, NY
Seneca County has 1,613 business listings across 407 categories. The largest categories in Seneca County business listings are Winery (51, 3.2%), Churches & Religious Organizations (32, 2.0%), and Landmark And Historical Building (31, 1.9%). The full Seneca County business listings dataset includes names, categories, addresses and contact details where available. Seneca County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Seneca County, NY
| Category | Businesses | Share |
|---|---|---|
| Winery | 51 | 3.2% |
| Churches & Religious Organizations | 32 | 2.0% |
| Landmark And Historical Building | 31 | 1.9% |
| Farm | 30 | 1.9% |
| Community & Nonprofits | 28 | 1.7% |
| Auto Repair | 28 | 1.7% |
| Gas Stations | 26 | 1.6% |
| Bed And Breakfast | 24 | 1.5% |
| Clothing Stores | 24 | 1.5% |
| Parks & Recreation | 20 | 1.2% |
Seneca County Business Listings
| Business | Category | City |
|---|---|---|
| The Gould Hotel | Accommodation | Seneca Falls |
| D & K Ranch Trail Riding | Active Life | Interlaken |
| Seneca Falls Acupuncture | Acupuncture | Seneca Falls |
| Drug Detox Waterloo | Addiction Rehabilitation Center | Waterloo |
| Show World | Adult Entertainment | Waterloo |
| Seneca County Area Shopper | Advertising Agency | Romulus |
| Keystone Mills | Agricultural Cooperatives | Romulus |
| Farmer Boy | Agricultural Service | Junius |
| Ovid Airport | Airport | Ovid |
| Dick Van Dyke Addiction Treatment Center | Alcohol And Drug Treatment Centers | Ovid |
| Download Seneca County business listings | ||
Seneca County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Seneca County Basemaps
Seneca 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 Seneca County Data Package
This page shows a preview of what's included in the Seneca 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.
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Nearby Counties
Browse county data pages for the counties that border Seneca County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.