Lost River, ID Demographics

A map of Lost River's Population by Race

Lost River, Idaho has an estimated population of 55, a dramatic increase from the 42 recorded in the 2020 Census. The population is 76.4% White, 10.9% Black, 7.3% Asian, 5.5% Hispanic, 0.0% Native American/Other, and 0.0% Multiracial. This demographic dot map shows the population of Lost River, with one dot drawn for each person counted by the Census, color-coded by race.

Lost River has become considerably more racially diverse since the 2020 Census. It is more diverse than Idaho overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Lost River, that probability was 21.7% in 2020 and 39.7% in the most recent ACS estimates.

Lost River is ranked the 222nd most populous place in Idaho, out of 236 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). Lost River was ranked the 228th most populous place in the 2020 Census.

Lost River's White Population

42 residents of Lost River, or 76.4% of the population, identify as White. The share of White residents in Lost River is slightly lower than in Idaho overall, where 78.6% of the population is White. Lost River ranks 85th statewide in terms of White residents as a share of the population, out of 236 places.

Since the 2020 Census, Lost River's White population has grown by an estimated 13.5%. White residents' share of Lost River's population has decreased from 88.1% to 76.4%.

Lost River is more White than neighboring Butte City (61.1% White), and Carey (49.3% White). Lost River is less White than neighboring Mackay (89.2% White), Moore (94.3% White), and Arco (84.6% White).

Lost River's Black Population

6 residents of Lost River, or 10.9% of the population, identify as Black. The share of Black residents in Lost River is considerably higher than in Idaho overall, where 0.7% of the population is Black. Lost River ranks 134th statewide in terms of Black residents as a share of the population, out of 236 places.

Since the 2020 Census, Lost River's Black population has grown from 0 to an estimated 6. Black residents' share of Lost River's population has increased from 0.0% to 10.9%.

Lost River is more Black than neighboring Mackay (0% Black), Moore (0% Black), Arco (0% Black), Butte City (0% Black), and Carey (0% Black).

Lost River's Asian Population

4 residents of Lost River, or 7.3% of the population, identify as Asian. The share of Asian residents in Lost River is higher than in Idaho overall, where 1.3% of the population is Asian. Lost River ranks 168th statewide in terms of Asian residents as a share of the population, out of 236 places.

Since the 2020 Census, Lost River's Asian population has grown from 0 to an estimated 4. Asian residents' share of Lost River's population has increased from 0.0% to 7.3%.

Lost River is more Asian than neighboring Mackay (0% Asian), Moore (0% Asian), Arco (0% Asian), Butte City (0% Asian), and Carey (0% Asian).

Lost River's Hispanic Population

3 residents of Lost River, or 5.5% of the population, identify as Hispanic. The share of Hispanic residents in Lost River is lower than in Idaho overall, where 13.6% of the population is Hispanic. Lost River ranks 109th statewide in terms of Hispanic residents as a share of the population, out of 236 places.

Since the 2020 Census, Lost River's Hispanic population has remained roughly the same. Hispanic residents' share of Lost River's population has decreased from 7.1% to 5.5%.

Lost River is more Hispanic than neighboring Moore (1.3% Hispanic). Lost River is less Hispanic than neighboring Mackay (8.3% Hispanic), Arco (6.7% Hispanic), Butte City (11.6% Hispanic), and Carey (50.7% Hispanic).

Lost River's Native American/Other Population

0 residents of Lost River, 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 Lost River is comparable to the share in Idaho overall, where 1.5% of the population is Native American/Other. Lost River ranks 206th statewide in terms of Native American/Other residents as a share of the population, out of 236 places.

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

Lost River's Multiracial Population

0 residents of Lost River, or 0.0% of the population, identify as Multiracial. The share of Multiracial residents in Lost River is slightly lower than in Idaho overall, where 4.2% of the population is Multiracial. Lost River ranks 72nd statewide in terms of Multiracial residents as a share of the population, out of 236 places.

Since the 2020 Census, Lost River's Multiracial population has declined by an estimated 100.0%. Multiracial residents' share of Lost River's population has decreased from 4.8% to 0.0%.

Lost River is less Multiracial than neighboring Mackay (2.5% Multiracial), Moore (4.4% Multiracial), Arco (8.7% Multiracial), and Butte City (27.4% 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.