• county
  • FIPS 36099
  • Largest town: Waterloo

Seneca County, New York

Seneca County had 32,650 residents in the Census Vintage 2024 estimate, on 323.7 square miles of land. It ranks 57th of 62 in New York by population and 53rd by land area.

Population
32,650
#57 of 62 in New York · #1,377 in US
Area
323.7 sq mi
#53 of 62 in New York · #2,753 in US
Density
101 / sq mi
#36 of 62 in New York · #898 in US
Median household income
$58,581
#55 of 62 in New York · #1,983 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Seneca County within New York. Pin: Albany.

Measure from here

Tools and pages that start from Seneca County

Seneca County population, land area and income

Seneca County had 32,650 residents in the Census Vintage 2024 estimate, on 323.7 square miles of land. It ranks 57th of 62 in New York by population and 53rd by land area. That works out to 100.9 people per square mile, near the US average of 96.3, and above the national county median.

The median county-equivalent in New York has 85,936 residents, so Seneca County has 38% of the typical county's population.

Its SAIPE 2023 median household income of $58,581 is below the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

32,650

3144th1st

1377th of 3,144 (US)

Land area

324 sq mi

3144th1st

2753rd of 3,144 (US)

Density

100.9 / sq mi

3144th1st

898th of 3,144 (US)

Median household income

$58,581

3143rd1st

1983rd of 3,143 (US)

Rank within New York (62)

Population

32,650

62nd1st

57th of 62 (NY)

Land area

324 sq mi

62nd1st

53rd of 62 (NY)

Density

100.9 / sq mi

62nd1st

36th of 62 (NY)

Median household income

$58,581

62nd1st

55th of 62 (NY)

How Seneca County's population changed since 2020

Seneca County lost 862 residents between the July 2020 and July 2024 estimates, a drop of 2.6%. That ranks 56th of 62 in New York for growth. The median New York county changed by -0.8%, and the state as a whole by -1.2%.

Since the April 2020 estimates base, Seneca County recorded 1,345 births and 1,605 deaths, a natural change of -260. Net international migration added +225 and net domestic migration, people moving to or from other US counties, came to -1,148. The largest single component was domestic migration, which removed 1,148 people.

33.5k202033.4k202132.6k202232.4k202332.7k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
1,345
Deaths
1,605
Net international migration
+225
Net domestic migration
-1,148
Change, July 2023 to July 2024
+234

Where Seneca County is

The Census internal point of Seneca County is at 42.782300, -76.827100. It sits in UTM zone 18N. The map shades New York's 62 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Seneca County outlined. Dots are towns of 1,000+ people with residents in it.

Tompkins County: +5.8%Yates County: -1.3%Suffolk County: +0.9%Broome County: -0.9%Cortland County: -1.7%Fulton County: -2.0%Ulster County: +0.9%Rockland County: +3.2%Essex County: -1.5%Westchester County: +0.5%Niagara County: -1.2%Dutchess County: +1.4%Seneca County: -2.6%Onondaga County: -0.9%Tioga County: -1.6%Erie County: -0.2%Wayne County: -0.5%Delaware County: -0.1%Greene County: -1.8%Schenectady County: +1.9%Allegany County: -0.1%Rensselaer County: -0.1%Monroe County: -0.7%Warren County: -0.5%Livingston County: -0.1%Madison County: -1.3%Jefferson County: -2.5%Sullivan County: +2.5%Lewis County: +0.0%Oswego County: +0.7%Putnam County: +0.8%New York County: -1.1%Columbia County: -1.8%St. Lawrence County: -2.0%Schuyler County: -4.1%Franklin County: -0.3%Steuben County: -1.4%Cayuga County: -2.1%Oneida County: -1.2%Chemung County: -3.1%Herkimer County: -0.7%Schoharie County: +1.3%Cattaraugus County: -2.0%Chautauqua County: -2.6%Chenango County: -2.8%Hamilton County: +0.2%Orange County: +2.7%Washington County: -2.1%Ontario County: +0.6%Bronx County: -5.1%Wyoming County: -1.5%Clinton County: -2.3%Orleans County: -1.0%Montgomery County: +0.3%Nassau County: +0.1%Kings County: -3.6%Genesee County: -1.2%Otsego County: +3.7%Albany County: +1.9%Queens County: -3.1%Richmond County: +0.6%Saratoga County: +1.9%
Change 2020 to 2024
  1. < -2.0%
  2. < -1.2%
  3. < -0.2%
  4. < +0.7%
  5. ≥ +0.7%
no data

Orange pin: Seneca County internal point. Dark pin: Albany.

Internal point

Decimal
42.782300, -76.827100
DMS
42°46'56.28"N 76°49'37.56"W
UTM
18N 350549.4E 4738258.8N
Geohash
dr977u20y
Plus code
87J5Q5JF+W5

Towns in Seneca County

One incorporated place of 1,000+ people has residents in Seneca County, 4,722 people together, or 14% of the county. Each figure counts only the part of the town inside Seneca County; towns marked "part" extend into another county. The largest is Waterloo with 4,722.

  1. 01Waterloo4,722
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Seneca County

The Census 2024 county adjacency file lists 6 neighbors for Seneca County. The most populous is Ontario County, NY, with 113,012 residents. Distances run between Census internal points in a straight line.

Distance to Albany and the nearest big city

Albany is 156.1 miles E of Seneca County's internal point in a straight line. The nearest place of 100,000 or more is Syracuse, NY (population 146,097), 39.0 miles away. The nearest place of 10,000 or more is Geneva, NY (population 12,397), 9.7 miles away.

Seneca County FIPS code

The FIPS code of Seneca County is 36099: state code 36 for New York plus county code 099. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $58,581.

Questions people ask

What is the population of Seneca County, New York?

The Census Vintage 2024 estimate for July 1, 2024 is 32,650. That is down 862 people (2.6%) from the July 2020 estimate of 33,512.

What is the FIPS code of Seneca County?

36099. The first two digits (36) are New York; the last three (099) identify the county.

What is the largest town in Seneca County?

Waterloo, with 4,722 residents inside Seneca County in 2024.

Which counties border Seneca County?

6 county-equivalents border it in the Census 2024 adjacency file: Ontario County, NY; Tompkins County, NY; Wayne County, NY; Cayuga County, NY; Yates County, NY; Schuyler County, NY.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.