DeKalb County Demographics

A map of DeKalb County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	9,465	9,653	87.0%	87.5%
Black	710	672	6.5%	6.1%
Multiracial	335	379	3.1%	3.4%
Hispanic	258	227	2.4%	2.1%
Asian	62	42	0.6%	0.4%
Native American/Other	46	56	0.4%	0.5%

DeKalb County, Missouri has an estimated population of 10,876, a slight decrease from the 11,029 recorded in the 2020 Census. The population is 87.0% White, 6.5% Black, 3.1% Multiracial, 2.4% Hispanic, 0.6% Asian, and 0.4% Native American/Other. This demographic dot map shows the population of DeKalb County, with one dot drawn for each person counted by the Census, color-coded by race.

DeKalb has become slightly more racially diverse since the 2020 Census. It is considerably less diverse than Missouri overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In DeKalb County, that probability was 22.9% in 2020 and 23.7% in the most recent ACS estimates.

DeKalb County is ranked the 80th most populous county in Missouri, out of 115 counties. DeKalb County was ranked the 80th most populous county in the 2020 Census.

DeKalb County's White Population

9,465 residents of DeKalb County, or 87.0% of the population, identify as White. The share of White residents in DeKalb County is considerably higher than in Missouri overall, where 76.3% of the population is White. DeKalb County ranks 77th statewide in terms of White residents as a share of the population, out of 115 counties.

Since the 2020 Census, DeKalb County's White population has declined by an estimated 1.9%. White residents' share of DeKalb County's population has decreased from 87.5% to 87.0%.

DeKalb County is more White than neighboring Buchanan County (79.7% White). DeKalb County is less White than neighboring Clinton County (91.9% White), Gentry County (93.4% White), Andrew County (92.4% White), and Daviess County (95.1% White).

DeKalb County's Black Population

710 residents of DeKalb County, or 6.5% of the population, identify as Black. The share of Black residents in DeKalb County is slightly lower than in Missouri overall, where 10.9% of the population is Black. DeKalb County ranks 15th statewide in terms of Black residents as a share of the population, out of 115 counties.

Since the 2020 Census, DeKalb County's Black population has grown by an estimated 5.7%. Black residents' share of DeKalb County's population has remained roughly unchanged at 6.5%.

DeKalb County is more Black than neighboring Clinton County (0.8% Black), Gentry County (0.4% Black), Andrew County (1.3% Black), Daviess County (1% Black), and Buchanan County (5.6% Black).

DeKalb County's Asian Population

62 residents of DeKalb County, or 0.6% of the population, identify as Asian. The share of Asian residents in DeKalb County is comparable to the share in Missouri overall, where 2.1% of the population is Asian. DeKalb County ranks 54th statewide in terms of Asian residents as a share of the population, out of 115 counties.

Since the 2020 Census, DeKalb County's Asian population has grown by an estimated 47.6%. Asian residents' share of DeKalb County's population has remained roughly unchanged at 0.6%.

DeKalb County is more Asian than neighboring Clinton County (0.2% Asian), and Daviess County (0.2% Asian). DeKalb County is less Asian than neighboring Gentry County (0.7% Asian), Andrew County (0.8% Asian), and Buchanan County (1.1% Asian).

DeKalb County's Hispanic Population

258 residents of DeKalb County, or 2.4% of the population, identify as Hispanic. The share of Hispanic residents in DeKalb County is slightly lower than in Missouri overall, where 5.2% of the population is Hispanic. DeKalb County ranks 63rd statewide in terms of Hispanic residents as a share of the population, out of 115 counties.

Since the 2020 Census, DeKalb County's Hispanic population has grown by an estimated 13.7%. Hispanic residents' share of DeKalb County's population has remained roughly unchanged at 2.4%.

DeKalb County is more Hispanic than neighboring Gentry County (2% Hispanic), and Daviess County (1.8% Hispanic). DeKalb County is less Hispanic than neighboring Clinton County (2.6% Hispanic), Andrew County (2.6% Hispanic), and Buchanan County (7.6% Hispanic).

DeKalb County's Native American/Other Population

46 residents of DeKalb County, or 0.4% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in DeKalb County is comparable to the share in Missouri overall, where 0.7% of the population is Native American/Other. DeKalb County ranks 83rd statewide in terms of Native American/Other residents as a share of the population, out of 115 counties.

Since the 2020 Census, DeKalb County's Native American/Other population has declined by an estimated 17.9%. Native American/Other residents' share of DeKalb County's population has remained roughly unchanged at 0.4%.

DeKalb County is more Native American/Other than neighboring Clinton County (0.3% Native American/Other), Gentry County (0.2% Native American/Other), Andrew County (0.1% Native American/Other), and Daviess County (0.2% Native American/Other). DeKalb County is less Native American/Other than neighboring Buchanan County (0.8% Native American/Other).

DeKalb County's Multiracial Population

335 residents of DeKalb County, or 3.1% of the population, identify as Multiracial. The share of Multiracial residents in DeKalb County is comparable to the share in Missouri overall, where 4.8% of the population is Multiracial. DeKalb County ranks 91st statewide in terms of Multiracial residents as a share of the population, out of 115 counties.

Since the 2020 Census, DeKalb County's Multiracial population has declined by an estimated 11.6%. Multiracial residents' share of DeKalb County's population has remained roughly unchanged at 3.1%.

DeKalb County is more Multiracial than neighboring Andrew County (2.7% Multiracial), and Daviess County (1.7% Multiracial). DeKalb County is less Multiracial than neighboring Clinton County (4.2% Multiracial), Gentry County (3.4% Multiracial), and Buchanan County (5.3% 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.