Arco, ID Demographics

A map of Arco's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	719	784	84.6%	89.2%
Multiracial	74	37	8.7%	4.2%
Hispanic	57	49	6.7%	5.6%
Black	0	1	0.0%	0.1%
Asian	0	3	0.0%	0.3%
Native American/Other	0	5	0.0%	0.6%

Arco, Idaho has an estimated population of 850, a decrease from the 879 recorded in the 2020 Census. The population is 84.6% White, 8.7% Multiracial, 6.7% Hispanic, 0.0% Black, 0.0% Asian, and 0.0% Native American/Other. This demographic dot map shows the population of Arco, with one dot drawn for each person counted by the Census, color-coded by race.

Arco has become considerably more racially diverse since the 2020 Census. It is considerably less 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 Arco, that probability was 20.0% in 2020 and 27.2% in the most recent ACS estimates.

Arco is ranked the 115th 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). Arco was ranked the 100th most populous place in the 2020 Census.

Arco's White Population

719 residents of Arco, or 84.6% of the population, identify as White. The share of White residents in Arco is higher than in Idaho overall, where 78.6% of the population is White. Arco ranks 74th statewide in terms of White residents as a share of the population, out of 236 places.

Since the 2020 Census, Arco's White population has declined by an estimated 8.3%. White residents' share of Arco's population has decreased from 89.2% to 84.6%.

Arco is more White than neighboring Butte City (61.1% White), Lost River (76.4% White), and Carey (49.3% White). Arco is less White than neighboring Moore (94.3% White), and Mackay (89.2% White).

Arco's Black Population

0 residents of Arco, or 0.0% of the population, identify as Black. The share of Black residents in Arco is comparable to the share in Idaho overall, where 0.7% of the population is Black. Arco ranks 123rd statewide in terms of Black residents as a share of the population, out of 236 places.

Since the 2020 Census, Arco's Black population has declined by an estimated 100.0%. Black residents' share of Arco's population has remained roughly unchanged at 0.0%.

Arco is less Black than neighboring Lost River (10.9% Black).

Arco's Asian Population

0 residents of Arco, or 0.0% of the population, identify as Asian. The share of Asian residents in Arco is comparable to the share in Idaho overall, where 1.3% of the population is Asian. Arco ranks 115th statewide in terms of Asian residents as a share of the population, out of 236 places.

Since the 2020 Census, Arco's Asian population has declined by an estimated 100.0%. Asian residents' share of Arco's population has remained roughly unchanged at 0.0%.

Arco is less Asian than neighboring Lost River (7.3% Asian).

Arco's Hispanic Population

57 residents of Arco, or 6.7% of the population, identify as Hispanic. The share of Hispanic residents in Arco is lower than in Idaho overall, where 13.6% of the population is Hispanic. Arco ranks 126th statewide in terms of Hispanic residents as a share of the population, out of 236 places.

Since the 2020 Census, Arco's Hispanic population has grown by an estimated 16.3%. Hispanic residents' share of Arco's population has increased from 5.6% to 6.7%.

Arco is more Hispanic than neighboring Moore (1.3% Hispanic), and Lost River (5.5% Hispanic). Arco is less Hispanic than neighboring Butte City (11.6% Hispanic), Mackay (8.3% Hispanic), and Carey (50.7% Hispanic).

Arco's Native American/Other Population

0 residents of Arco, 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 Arco is comparable to the share in Idaho overall, where 1.5% of the population is Native American/Other. Arco ranks 175th statewide in terms of Native American/Other residents as a share of the population, out of 236 places.

Since the 2020 Census, Arco's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Arco's population has decreased from 0.6% to 0.0%.

Arco's Multiracial Population

74 residents of Arco, or 8.7% of the population, identify as Multiracial. The share of Multiracial residents in Arco is slightly higher than in Idaho overall, where 4.2% of the population is Multiracial. Arco ranks 99th statewide in terms of Multiracial residents as a share of the population, out of 236 places.

Since the 2020 Census, Arco's Multiracial population has grown by an estimated 100.0%. Multiracial residents' share of Arco's population has increased from 4.2% to 8.7%.

Arco is more Multiracial than neighboring Moore (4.4% Multiracial), Lost River (0% Multiracial), Mackay (2.5% Multiracial), and Carey (0% Multiracial). Arco is less Multiracial than neighboring 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.