Ontario Population

2010–2026

527

2026 projection

1.3% since 2020 (decrease)

0100200300400500600201020122014201620182020202220242026

Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Ontario. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026527-10.19%
202552800.00%
2024528+10.19%
2023527-50.94%
2022532+10.19%
2021531-30.56%
2020534+40.75%
2019530+10.19%
2018529-10.19%
2017530-40.75%

Showing 10 of 17 years.

The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.

Growth since 2020, compared

Ontario has a population change lower than Vernon County, Wisconsin, and the U.S.

  • United States+3.1%
  • Vernon County+2.4%
  • Wisconsin+1.3%
  • Ontario−0.8%

Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.

Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.

Ontario Demographics

37.1median age

Median age

Female42.3 yrs
Male35.1 yrs

Adults

316
76 seniors (65+) · 24% of adults240 other adults

Sex

Female 53.3% · 225Male 46.7% · 197

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 4 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Ontario Income

$50,250median household income

Median household income

$50,250

Half of households earn more, half earn less

Median earnings

$47,708

Typical yearly pay for a worker 25 or older.

Poverty rate

9.5%

About 1 in 11 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Ontario Marital Status

50% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married50%53%46%
Never married33%39%27%
Divorced8%4%12%
Widowed9%3%15%
Separated<1%1%0%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201