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Ontario County, NY Demographics

Ontario County, NY is the 26th most populous of 62 counties in New York, with 112,458 residents across 644 square miles. That is about 175 people per square mile.

At the 2020 census

Population 112,458
Land area 644 sq mi
Density 175 / sq mi

Data: 2020 Census · American Community Survey 2024

How Ontario County compares to the US

We're computing this county's comparison table — check back shortly. Population, land area, and density above are already exact.

Central Location: Ontario County, NY

Measured from the county's main population center using 2020 census blocks.

We're computing the drive-time and radius areas around Ontario County, NY — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.

Census tracts in Ontario County, NY

Name Population Sq mi Per sq mi
Census Tract 506.01 5,774 32.0 181
Census Tract 518.01 5,407 0.8 7,046
Census Tract 502.05 4,886 3.5 1,391
Census Tract 502.03 4,357 1.5 2,952
Census Tract 501.04 4,206 9.1 461
Census Tract 503.02 4,045 7.5 536
Census Tract 512 3,931 35.7 110
Census Tract 505.01 3,640 33.2 110
Census Tract 501.05 3,426 2.0 1,747
Census Tract 504.02 3,343 35.4 95
Census Tract 501.01 3,298 10.5 315
Census Tract 504.01 3,294 29.6 111
Census Tract 501.03 3,289 2.8 1,194
Census Tract 519 3,188 1.3 2,484
Census Tract 502.04 3,168 30.8 103
Census Tract 508 3,074 1.2 2,663
Census Tract 503.03 2,839 5.0 570
Census Tract 506.03 2,790 13.7 204
Census Tract 505.02 2,740 25.5 108
Census Tract 514 2,644 50.3 53
Census Tract 517 2,556 1.4 1,796
Census Tract 506.04 2,545 11.2 228
Census Tract 513.02 2,522 27.8 91
Census Tract 503.04 2,520 25.3 100
Census Tract 522 2,403 39.7 61
Census Tract 509 2,362 1.1 2,164
Census Tract 521.02 2,284 36.7 62
Census Tract 515.01 1,968 13.7 143
Census Tract 510.01 1,844 0.5 3,992
Census Tract 511.01 1,793 0.6 3,019
Census Tract 502.06 1,759 3.7 478
Census Tract 520.02 1,691 27.7 61
Census Tract 516 1,670 0.8 2,211
Census Tract 520.03 1,669 14.7 113
Census Tract 520.01 1,668 29.9 56
Census Tract 501.06 1,641 11.6 141
Census Tract 521.01 1,641 39.0 42
Census Tract 513.01 1,584 21.0 75
Census Tract 511.02 1,503 1.3 1,194
Census Tract 515.02 1,496 5.5 273

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About this page

This page shows demographics for a US county from the 2020 census and the American Community Survey: population, land area, density, urban share, and how the county compares to national averages for income, housing, age, and more.

Counties subdivide into census tracts, listed below with their populations. The drive-time and radius tables measure the population around the county's main population center.

Read how BlockAtlas computes population within an area →