Boundary County Demographics

A map of Boundary County's Population by Race

Boundary County, Idaho has an estimated population of 13,172, an increase from the 12,056 recorded in the 2020 Census. The population is 81.5% White, 7.7% Multiracial, 5.7% Hispanic, 2.8% Native American/Other, 2.1% Asian, and 0.3% Black. This demographic dot map shows the population of Boundary County, with one dot drawn for each person counted by the Census, color-coded by race.

Boundary has become considerably more racially diverse since the 2020 Census. It is 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 Boundary County, that probability was 22.9% in 2020 and 32.6% in the most recent ACS estimates.

Boundary County is ranked the 25th most populous county in Idaho, out of 44 counties. Boundary County was ranked the 25th most populous county in the 2020 Census.

Boundary County's White Population

10,731 residents of Boundary County, or 81.5% of the population, identify as White. The share of White residents in Boundary County is slightly higher than in Idaho overall, where 78.6% of the population is White. Boundary County ranks 15th statewide in terms of White residents as a share of the population, out of 44 counties.

Since the 2020 Census, Boundary County's White population has grown by an estimated 1.7%. White residents' share of Boundary County's population has decreased from 87.5% to 81.5%.

Boundary County is less White than neighboring Bonner County (89% White), Pend Oreille County (84.7% White), Lincoln County (90% White), Kootenai County (85.6% White), and Stevens County (83.8% White).

Boundary County's Black Population

43 residents of Boundary County, or 0.3% of the population, identify as Black. The share of Black residents in Boundary County is comparable to the share in Idaho overall, where 0.7% of the population is Black. Boundary County ranks 20th statewide in terms of Black residents as a share of the population, out of 44 counties.

Since the 2020 Census, Boundary County's Black population has grown by an estimated 59.3%. Black residents' share of Boundary County's population has remained roughly unchanged at 0.3%.

Boundary County is more Black than neighboring Pend Oreille County (0.2% Black), and Lincoln County (0.1% Black).

Boundary County's Asian Population

272 residents of Boundary County, or 2.1% of the population, identify as Asian. The share of Asian residents in Boundary County is comparable to the share in Idaho overall, where 1.3% of the population is Asian. Boundary County ranks 15th statewide in terms of Asian residents as a share of the population, out of 44 counties.

Since the 2020 Census, Boundary County's Asian population has grown by an estimated 277.8%. Asian residents' share of Boundary County's population has increased from 0.6% to 2.1%.

Boundary County is more Asian than neighboring Bonner County (0.5% Asian), Pend Oreille County (0.5% Asian), Lincoln County (0.2% Asian), Kootenai County (0.7% Asian), and Stevens County (0.8% Asian).

Boundary County's Hispanic Population

753 residents of Boundary County, or 5.7% of the population, identify as Hispanic. The share of Hispanic residents in Boundary County is lower than in Idaho overall, where 13.6% of the population is Hispanic. Boundary County ranks 25th statewide in terms of Hispanic residents as a share of the population, out of 44 counties.

Since the 2020 Census, Boundary County's Hispanic population has grown by an estimated 8.8%. Hispanic residents' share of Boundary County's population has remained roughly unchanged at 5.7%.

Boundary County is more Hispanic than neighboring Bonner County (4% Hispanic), Pend Oreille County (4% Hispanic), Lincoln County (3.1% Hispanic), and Stevens County (4.2% Hispanic).

Boundary County's Native American/Other Population

363 residents of Boundary County, or 2.8% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Boundary County is comparable to the share in Idaho overall, where 1.5% of the population is Native American/Other. Boundary County ranks 11th statewide in terms of Native American/Other residents as a share of the population, out of 44 counties.

Since the 2020 Census, Boundary County's Native American/Other population has grown by an estimated 61.3%. Native American/Other residents' share of Boundary County's population has increased from 1.9% to 2.8%.

Boundary County is more Native American/Other than neighboring Bonner County (1.4% Native American/Other), Lincoln County (1.4% Native American/Other), and Kootenai County (1.5% Native American/Other). Boundary County is less Native American/Other than neighboring Pend Oreille County (3% Native American/Other), and Stevens County (5.1% Native American/Other).

Boundary County's Multiracial Population

1,010 residents of Boundary County, or 7.7% of the population, identify as Multiracial. The share of Multiracial residents in Boundary County is slightly higher than in Idaho overall, where 4.2% of the population is Multiracial. Boundary County ranks 17th statewide in terms of Multiracial residents as a share of the population, out of 44 counties.

Since the 2020 Census, Boundary County's Multiracial population has grown by an estimated 106.1%. Multiracial residents' share of Boundary County's population has increased from 4.1% to 7.7%.

Boundary County is more Multiracial than neighboring Bonner County (4.7% Multiracial), Pend Oreille County (7.6% Multiracial), Lincoln County (5.3% Multiracial), Kootenai County (6.2% Multiracial), and Stevens County (5.8% 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.