Onaka, SD Demographics

A map of Onaka's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	25	12	100.0%	92.3%
Black	0	0	0.0%	0.0%
Asian	0	0	0.0%	0.0%
Hispanic	0	1	0.0%	7.7%
Native American/Other	0	0	0.0%	0.0%
Multiracial	0	0	0.0%	0.0%

Onaka, South Dakota has an estimated population of 25, a dramatic increase from the 13 recorded in the 2020 Census. The population is 100.0% White, 0.0% Black, 0.0% Asian, 0.0% Hispanic, 0.0% Native American/Other, and 0.0% Multiracial. This demographic dot map shows the population of Onaka, with one dot drawn for each person counted by the Census, color-coded by race.

Onaka has become considerably less racially diverse since the 2020 Census. It is considerably less diverse than South Dakota overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Onaka, that probability was 14.2% in 2020 and 0.0% in the most recent ACS estimates.

Onaka is ranked the 402nd most populous place in South Dakota, out of 485 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). Onaka was ranked the 449th most populous place in the 2020 Census.

Onaka's White Population

25 residents of Onaka, or 100.0% of the population, identify as White. The share of White residents in Onaka is significantly higher than in South Dakota overall, where 79.8% of the population is White. Onaka ranks 182nd statewide in terms of White residents as a share of the population, out of 485 places.

Since the 2020 Census, Onaka's White population has grown by an estimated 108.3%. White residents' share of Onaka's population has increased from 92.3% to 100.0%.

Onaka is more White than neighboring Thunderbird Colony (0% White), and Roscoe (85.4% White).

Onaka's Black Population

0 residents of Onaka, or 0.0% of the population, identify as Black. The share of Black residents in Onaka is slightly lower than in South Dakota overall, where 2.1% of the population is Black. Onaka ranks 183rd statewide in terms of Black residents as a share of the population, out of 485 places.

Since the 2020 Census, Onaka's Black population has grown from 0 to an estimated 0. Black residents' share of Onaka's population has remained roughly unchanged at 0.0%.

Onaka's Asian Population

0 residents of Onaka, or 0.0% of the population, identify as Asian. The share of Asian residents in Onaka is comparable to the share in South Dakota overall, where 1.4% of the population is Asian. Onaka ranks 176th statewide in terms of Asian residents as a share of the population, out of 485 places.

Since the 2020 Census, Onaka's Asian population has grown from 0 to an estimated 0. Asian residents' share of Onaka's population has remained roughly unchanged at 0.0%.

Onaka is less Asian than neighboring Roscoe (1.3% Asian).

Onaka's Hispanic Population

0 residents of Onaka, or 0.0% of the population, identify as Hispanic. The share of Hispanic residents in Onaka is slightly lower than in South Dakota overall, where 4.8% of the population is Hispanic. Onaka ranks 50th statewide in terms of Hispanic residents as a share of the population, out of 485 places.

Since the 2020 Census, Onaka's Hispanic population has declined by an estimated 100.0%. Hispanic residents' share of Onaka's population has decreased from 7.7% to 0.0%.

Onaka is less Hispanic than neighboring Roscoe (8.9% Hispanic).

Onaka's Native American/Other Population

0 residents of Onaka, or 0.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Onaka is lower than in South Dakota overall, where 7.5% of the population is Native American/Other. Onaka ranks 345th statewide in terms of Native American/Other residents as a share of the population, out of 485 places.

Since the 2020 Census, Onaka's Native American/Other population has grown from 0 to an estimated 0. Native American/Other residents' share of Onaka's population has remained roughly unchanged at 0.0%.

Onaka is less Native American/Other than neighboring Roscoe (1.9% Native American/Other).

Onaka's Multiracial Population

0 residents of Onaka, or 0.0% of the population, identify as Multiracial. The share of Multiracial residents in Onaka is slightly lower than in South Dakota overall, where 4.4% of the population is Multiracial. Onaka ranks 405th statewide in terms of Multiracial residents as a share of the population, out of 485 places.

Since the 2020 Census, Onaka's Multiracial population has grown from 0 to an estimated 0. Multiracial residents' share of Onaka's population has remained roughly unchanged at 0.0%.

Onaka is less Multiracial than neighboring Roscoe (2.5% 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.