Firth, ID Demographics

A map of Firth's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	352	343	82.1%	66.3%
Hispanic	63	146	14.7%	28.2%
Multiracial	12	9	2.8%	1.7%
Native American/Other	2	16	0.5%	3.1%
Black	0	1	0.0%	0.2%
Asian	0	2	0.0%	0.4%

Firth, Idaho has an estimated population of 429, a large decrease from the 517 recorded in the 2020 Census. The population is 82.1% White, 14.7% Hispanic, 2.8% Multiracial, 0.5% Native American/Other, 0.0% Black, and 0.0% Asian. This demographic dot map shows the population of Firth, with one dot drawn for each person counted by the Census, color-coded by race.

Firth has become considerably less 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 Firth, that probability was 47.9% in 2020 and 30.4% in the most recent ACS estimates.

Firth is ranked the 154th 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). Firth was ranked the 129th most populous place in the 2020 Census.

Firth's White Population

352 residents of Firth, or 82.1% of the population, identify as White. The share of White residents in Firth is slightly higher than in Idaho overall, where 78.6% of the population is White. Firth ranks 196th statewide in terms of White residents as a share of the population, out of 236 places.

Since the 2020 Census, Firth's White population has grown by an estimated 2.6%. White residents' share of Firth's population has increased from 66.3% to 82.1%.

Firth is more White than neighboring Basalt (72.6% White), Shelley (76.9% White), Blackfoot (75.4% White), and Idaho Falls (77.5% White). Firth is less White than neighboring Groveland (97% White).

Firth's Black Population

0 residents of Firth, or 0.0% of the population, identify as Black. The share of Black residents in Firth is comparable to the share in Idaho overall, where 0.7% of the population is Black. Firth ranks 98th statewide in terms of Black residents as a share of the population, out of 236 places.

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

Firth is less Black than neighboring Shelley (0.3% Black), Blackfoot (0.3% Black), and Idaho Falls (0.5% Black).

Firth's Asian Population

0 residents of Firth, or 0.0% of the population, identify as Asian. The share of Asian residents in Firth is comparable to the share in Idaho overall, where 1.3% of the population is Asian. Firth ranks 106th statewide in terms of Asian residents as a share of the population, out of 236 places.

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

Firth is less Asian than neighboring Basalt (0.7% Asian), Shelley (0.5% Asian), Blackfoot (0.1% Asian), and Idaho Falls (0.5% Asian).

Firth's Hispanic Population

63 residents of Firth, or 14.7% of the population, identify as Hispanic. The share of Hispanic residents in Firth is comparable to the share in Idaho overall, where 13.6% of the population is Hispanic. Firth ranks 34th statewide in terms of Hispanic residents as a share of the population, out of 236 places.

Since the 2020 Census, Firth's Hispanic population has declined by an estimated 56.8%. Hispanic residents' share of Firth's population has decreased from 28.2% to 14.7%.

Firth is more Hispanic than neighboring Groveland (2.3% Hispanic). Firth is less Hispanic than neighboring Basalt (17.8% Hispanic), Shelley (16.2% Hispanic), Blackfoot (18.6% Hispanic), and Idaho Falls (16.7% Hispanic).

Firth's Native American/Other Population

2 residents of Firth, or 0.5% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Firth is comparable to the share in Idaho overall, where 1.5% of the population is Native American/Other. Firth ranks 26th statewide in terms of Native American/Other residents as a share of the population, out of 236 places.

Since the 2020 Census, Firth's Native American/Other population has declined by an estimated 87.5%. Native American/Other residents' share of Firth's population has decreased from 3.1% to 0.5%.

Firth is more Native American/Other than neighboring Shelley (0% Native American/Other), and Groveland (0% Native American/Other). Firth is less Native American/Other than neighboring Basalt (4.6% Native American/Other), Blackfoot (2.6% Native American/Other), and Idaho Falls (1% Native American/Other).

Firth's Multiracial Population

12 residents of Firth, or 2.8% of the population, identify as Multiracial. The share of Multiracial residents in Firth is comparable to the share in Idaho overall, where 4.2% of the population is Multiracial. Firth ranks 212th statewide in terms of Multiracial residents as a share of the population, out of 236 places.

Since the 2020 Census, Firth's Multiracial population has grown by an estimated 33.3%. Multiracial residents' share of Firth's population has increased from 1.7% to 2.8%.

Firth is more Multiracial than neighboring Groveland (0.7% Multiracial). Firth is less Multiracial than neighboring Basalt (4.4% Multiracial), Shelley (6.1% Multiracial), Blackfoot (3% Multiracial), and Idaho Falls (3.8% 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.