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Ontario County, New York

Ontario County: county in New York, United States.

About

Ontario County is a county located in the U.S. state of New York. As of the 2010 census, the population was 107,931 and a population density of 63 people per km². After 10 years in 2020 county had an estimated population of 110,091 inhabitants. Its county seat is Canandaigua. The county was created 237 years ago in 1788.

Ontario County locator map
Location of Ontario County on New York map.

County Snapshot

Ontario County at a glance

Ontario County currently has 5 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

5

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

Top linked places

Canandaigua 11,373 Geneva 3,348 Clifton Springs 2,012 Phelps 1,901

Quick Facts about Ontario County

Population 110,091 (2020)
Country United States of America
State New York (United States)
Different from Ontario
Twitter username ontariocountyny
Area 1716 km2
Water as percent of area 2.8%
Land as percent of area 97.2%
Latitude & Longitude 42.8529,-77.2998
Named for Lake Ontario
Altitude 988 feet / 301 meters
Capital Canandaigua
Establishment January 01, 1789
Time Zone America/New_York
Local time 07:16:56 (23rd September 2026)
Density 64 Pop. per km² as of 2020
Population growth 2% (2010-2020)
Weather 62℉ Partly Sunny 7-days weather
Ontario County Courthouse Canandaigua NY image
Ontario County Courthouse Canandaigua NY image

Geography

Ontario County is located at 42°51'10"N 77°17'59"W (42.8528500, -77.2998200). It has 5 neighbors: Livingston County, Seneca County, Steuben County, Wayne County and Yates County.

Ontario County map

Click "full screen" full screen map icon to open full mode. View satellite images

The largest city of Ontario County is Canandaigua with a population of 11,373. Other cities include, Geneva population 3,348, Clifton Springs population 2,012, Phelps population 1,901 and Shortsville population 1,403. See all Ontario County cities & populated places.

Ontario County Populated Places

Cities, towns, neighborhoods & other populated places in Ontario County.

City Name Population Title
Canandaigua 11,373 City in the state of New York, USA
Geneva 3,348 City in New York, USA
Clifton Springs 2,012 Village in Ontario County, New York, United States of America
Phelps 1,901 Town in Sequoyah County, Oklahoma, USA
Shortsville 1,403 City in Ontario County, New York, United States of America

Weather

62°F
Partly Sunny
6 to 10 mph E Wednesday

Partly sunny, with a high near 62. East wind 6 to 10 mph.

7-Day Forecast

Official website of Ontario County

Official Website Twitter

Demographics

The population of Ontario County increased by 2% in 10 years.

Year Population % Change Method
2010 107,931 - census
2011 108,599 0.62% estimation process
2012 108,611 0.01% estimation process
2013 109,044 0.4% estimation process
2014 109,334 0.27% estimation process
2015 109,271 -0.06% estimation process
2016 109,229 -0.04% estimation process
2017 109,538 0.28% estimation process
2018 109,738 0.18% estimation process
2019 109,777 0.04% estimation process
2020 110,091 0.29% estimation process
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People born in Ontario County (6)

People born in Ontario County, including politician Asa Grover, entrepreneur Henry Morrison Flagler, Union Army General Hiram Berdan, .

More notable people

  • Anson Stager (American Civil War Union Army general and telegraph communications pioneer) he was born in 20/04/1825
  • Orville C. Pratt (American judge) he was born in 24/04/1819
  • John Nicholas Norton (American pastor) he was born in 01/01/1820

New York Other Counties (more counties)

County Name Population Title
New York City 8,398,748 The most populous city in the United States and the center of the New York metropolitan area.
Brooklyn 2,577,000 A borough of New York City.
Queens 2,339,150 The most populous borough of New York City.
Queens County 2,225,821 County in New York, United States
Manhattan 1,644,518 The most densely populated borough of New York City.
New York County 1,611,989 County in New York state, United States of America
Suffolk County 1,474,273 County in New York, United States
The Bronx 1,455,720 The fourth most populous borough of New York City.
Bronx County 1,401,142 Borough of New York City, United States
Nassau County 1,351,334 County in New York, United States
Westchester County 965,802 County in New York, United States.
Erie County 917,241 County in New York, United States
Hempstead 764,055 Located in Nassau County, New York, this hamlet and village is a major commercial and transportation hub.
Monroe County 740,900 County in Florida, United States
Brookhaven 479,883 This town in Suffolk County, New York, is the most populous in the state.
Richmond County 475,327 County in Georgia, United States

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