Ontario, OR Demographics

A map of Ontario's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	5,840	5,692	49.3%	48.9%
Hispanic	5,378	5,049	45.4%	43.4%
Multiracial	236	415	2.0%	3.6%
Asian	233	193	2.0%	1.7%
Black	86	125	0.7%	1.1%
Native American/Other	69	171	0.6%	1.5%

Ontario, Oregon has an estimated population of 11,842, a slight increase from the 11,645 recorded in the 2020 Census. The population is 49.3% White, 45.4% Hispanic, 2.0% Asian, 2.0% Multiracial, 0.7% Black, and 0.6% Native American/Other. This demographic dot map shows the population of Ontario, with one dot drawn for each person counted by the Census, color-coded by race.

Ontario has become less racially diverse since the 2020 Census. It is considerably more diverse than Oregon overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Ontario, that probability was 57.1% in 2020 and 55.0% in the most recent ACS estimates.

Ontario is ranked the 53rd most populous place in Oregon, out of 426 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Ontario was ranked the 54th most populous place in the 2020 Census.

Ontario's White Population

5,840 residents of Ontario, or 49.3% of the population, identify as White. The share of White residents in Ontario is significantly lower than in Oregon overall, where 71.4% of the population is White. Ontario ranks 403rd statewide in terms of White residents as a share of the population, out of 426 places.

Since the 2020 Census, Ontario's White population has grown by an estimated 2.6%. White residents' share of Ontario's population has remained roughly unchanged at 49.3%.

Ontario is more White than neighboring Nyssa (33.4% White). Ontario is less White than neighboring Fruitland (68% White), Payette (65.8% White), New Plymouth (76.6% White), and Annex (58.2% White).

Ontario's Black Population

86 residents of Ontario, or 0.7% of the population, identify as Black. The share of Black residents in Ontario is comparable to the share in Oregon overall, where 1.8% of the population is Black. Ontario ranks 53rd statewide in terms of Black residents as a share of the population, out of 426 places.

Since the 2020 Census, Ontario's Black population has declined by an estimated 31.2%. Black residents' share of Ontario's population has remained roughly unchanged at 0.7%.

Ontario is more Black than neighboring Fruitland (0% Black), Payette (0.2% Black), Nyssa (0% Black), New Plymouth (0% Black), and Annex (0% Black).

Ontario's Asian Population

233 residents of Ontario, or 2.0% of the population, identify as Asian. The share of Asian residents in Ontario is slightly lower than in Oregon overall, where 4.4% of the population is Asian. Ontario ranks 94th statewide in terms of Asian residents as a share of the population, out of 426 places.

Since the 2020 Census, Ontario's Asian population has grown by an estimated 20.7%. Asian residents' share of Ontario's population has remained roughly unchanged at 2.0%.

Ontario is more Asian than neighboring Payette (0% Asian), Nyssa (0% Asian), New Plymouth (0.9% Asian), and Annex (0% Asian). Ontario is less Asian than neighboring Fruitland (2.6% Asian).

Ontario's Hispanic Population

5,378 residents of Ontario, or 45.4% of the population, identify as Hispanic. The share of Hispanic residents in Ontario is significantly higher than in Oregon overall, where 14.7% of the population is Hispanic. Ontario ranks 15th statewide in terms of Hispanic residents as a share of the population, out of 426 places.

Since the 2020 Census, Ontario's Hispanic population has grown by an estimated 6.5%. Hispanic residents' share of Ontario's population has increased from 43.4% to 45.4%.

Ontario is more Hispanic than neighboring Fruitland (23.5% Hispanic), Payette (26.1% Hispanic), New Plymouth (15.5% Hispanic), and Annex (35.6% Hispanic). Ontario is less Hispanic than neighboring Nyssa (64.8% Hispanic).

Ontario's Native American/Other Population

69 residents of Ontario, or 0.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Ontario is comparable to the share in Oregon overall, where 1.6% of the population is Native American/Other. Ontario ranks 240th statewide in terms of Native American/Other residents as a share of the population, out of 426 places.

Since the 2020 Census, Ontario's Native American/Other population has declined by an estimated 59.6%. Native American/Other residents' share of Ontario's population has decreased from 1.5% to 0.6%.

Ontario is more Native American/Other than neighboring Nyssa (0% Native American/Other), and Annex (0% Native American/Other). Ontario is less Native American/Other than neighboring Fruitland (1% Native American/Other), Payette (2.8% Native American/Other), and New Plymouth (1.7% Native American/Other).

Ontario's Multiracial Population

236 residents of Ontario, or 2.0% of the population, identify as Multiracial. The share of Multiracial residents in Ontario is slightly lower than in Oregon overall, where 6.1% of the population is Multiracial. Ontario ranks 374th statewide in terms of Multiracial residents as a share of the population, out of 426 places.

Since the 2020 Census, Ontario's Multiracial population has declined by an estimated 43.1%. Multiracial residents' share of Ontario's population has decreased from 3.6% to 2.0%.

Ontario is more Multiracial than neighboring Nyssa (1.8% Multiracial). Ontario is less Multiracial than neighboring Fruitland (4.9% Multiracial), Payette (5.1% Multiracial), New Plymouth (5.3% Multiracial), and Annex (6.2% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.