Foster County Demographics

A map of Foster County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	3,126	3,199	93.1%	94.2%
Multiracial	85	88	2.5%	2.6%
Asian	61	13	1.8%	0.4%
Hispanic	57	66	1.7%	1.9%
Native American/Other	19	24	0.6%	0.7%
Black	10	7	0.3%	0.2%

Foster County, North Dakota has an estimated population of 3,358, a slight decrease from the 3,397 recorded in the 2020 Census. The population is 93.1% White, 2.5% Multiracial, 1.8% Asian, 1.7% Hispanic, 0.6% Native American/Other, and 0.3% Black. This demographic dot map shows the population of Foster County, with one dot drawn for each person counted by the Census, color-coded by race.

Foster has become more racially diverse since the 2020 Census. It is considerably less diverse than North Dakota overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Foster County, that probability was 11.2% in 2020 and 13.2% in the most recent ACS estimates.

Foster County is ranked the 32nd most populous county in North Dakota, out of 53 counties. Foster County was ranked the 32nd most populous county in the 2020 Census.

Foster County's White Population

3,126 residents of Foster County, or 93.1% of the population, identify as White. The share of White residents in Foster County is considerably higher than in North Dakota overall, where 81.7% of the population is White. Foster County ranks 12th statewide in terms of White residents as a share of the population, out of 53 counties.

Since the 2020 Census, Foster County's White population has declined by an estimated 2.3%. White residents' share of Foster County's population has decreased from 94.2% to 93.1%.

Foster County is more White than neighboring Eddy County (87.6% White), Stutsman County (89.7% White), and Benson County (42.7% White). Foster County is less White than neighboring Griggs County (93.6% White), and Wells County (95.1% White).

Foster County's Black Population

10 residents of Foster County, or 0.3% of the population, identify as Black. The share of Black residents in Foster County is slightly lower than in North Dakota overall, where 3.3% of the population is Black. Foster County ranks 36th statewide in terms of Black residents as a share of the population, out of 53 counties.

Since the 2020 Census, Foster County's Black population has grown by an estimated 42.9%. Black residents' share of Foster County's population has remained roughly unchanged at 0.3%.

Foster County is more Black than neighboring Eddy County (0% Black), and Wells County (0% Black). Foster County is less Black than neighboring Stutsman County (2.3% Black), Griggs County (0.8% Black), and Benson County (0.6% Black).

Foster County's Asian Population

61 residents of Foster County, or 1.8% of the population, identify as Asian. The share of Asian residents in Foster County is comparable to the share in North Dakota overall, where 1.6% of the population is Asian. Foster County ranks 33rd statewide in terms of Asian residents as a share of the population, out of 53 counties.

Since the 2020 Census, Foster County's Asian population has grown by an estimated 369.2%. Asian residents' share of Foster County's population has increased from 0.4% to 1.8%.

Foster County is more Asian than neighboring Eddy County (0% Asian), Stutsman County (0.6% Asian), Griggs County (0.2% Asian), Benson County (0.8% Asian), and Wells County (0.2% Asian).

Foster County's Hispanic Population

57 residents of Foster County, or 1.7% of the population, identify as Hispanic. The share of Hispanic residents in Foster County is slightly lower than in North Dakota overall, where 4.7% of the population is Hispanic. Foster County ranks 33rd statewide in terms of Hispanic residents as a share of the population, out of 53 counties.

Since the 2020 Census, Foster County's Hispanic population has declined by an estimated 13.6%. Hispanic residents' share of Foster County's population has remained roughly unchanged at 1.7%.

Foster County is more Hispanic than neighboring Wells County (0.6% Hispanic). Foster County is less Hispanic than neighboring Eddy County (5.4% Hispanic), Stutsman County (3.2% Hispanic), Griggs County (1.8% Hispanic), and Benson County (1.9% Hispanic).

Foster County's Native American/Other Population

19 residents of Foster County, or 0.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Foster County is slightly lower than in North Dakota overall, where 4.7% of the population is Native American/Other. Foster County ranks 39th statewide in terms of Native American/Other residents as a share of the population, out of 53 counties.

Since the 2020 Census, Foster County's Native American/Other population has declined by an estimated 20.8%. Native American/Other residents' share of Foster County's population has remained roughly unchanged at 0.6%.

Foster County is more Native American/Other than neighboring Griggs County (0.1% Native American/Other). Foster County is less Native American/Other than neighboring Eddy County (4.3% Native American/Other), Stutsman County (1.8% Native American/Other), and Benson County (50.3% Native American/Other).

Foster County's Multiracial Population

85 residents of Foster County, or 2.5% of the population, identify as Multiracial. The share of Multiracial residents in Foster County is comparable to the share in North Dakota overall, where 4% of the population is Multiracial. Foster County ranks 37th statewide in terms of Multiracial residents as a share of the population, out of 53 counties.

Since the 2020 Census, Foster County's Multiracial population has declined by an estimated 3.4%. Multiracial residents' share of Foster County's population has remained roughly unchanged at 2.5%.

Foster County is more Multiracial than neighboring Stutsman County (2.3% Multiracial). Foster County is less Multiracial than neighboring Eddy County (2.7% Multiracial), Griggs County (3.5% Multiracial), Benson County (3.6% Multiracial), and Wells County (3.5% 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.