Johnson County Demographics

A map of Johnson County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	45,821	44,415	83.7%	82.2%
Hispanic	2,821	2,595	5.2%	4.8%
Multiracial	2,353	3,201	4.3%	5.9%
Black	2,332	2,309	4.3%	4.3%
Asian	830	821	1.5%	1.5%
Native American/Other	575	672	1.1%	1.2%

Johnson County, Missouri has an estimated population of 54,732, a slight increase from the 54,013 recorded in the 2020 Census. The population is 83.7% White, 5.2% Hispanic, 4.3% Black, 4.3% Multiracial, 1.5% Asian, and 1.1% Native American/Other. This demographic dot map shows the population of Johnson County, with one dot drawn for each person counted by the Census, color-coded by race.

Johnson has become less 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 Johnson County, that probability was 31.6% in 2020 and 29.3% in the most recent ACS estimates.

Johnson County is ranked the 21st most populous county in Missouri, out of 115 counties. Johnson County was ranked the 21st most populous county in the 2020 Census.

Johnson County's White Population

45,821 residents of Johnson County, or 83.7% of the population, identify as White. The share of White residents in Johnson County is higher than in Missouri overall, where 76.3% of the population is White. Johnson County ranks 94th statewide in terms of White residents as a share of the population, out of 115 counties.

Since the 2020 Census, Johnson County's White population has grown by an estimated 3.2%. White residents' share of Johnson County's population has increased from 82.2% to 83.7%.

Johnson County is more White than neighboring Pettis County (82.1% White), Cass County (83.6% White), and Jackson County (59.3% White). Johnson County is less White than neighboring Lafayette County (89.7% White), and Henry County (91.3% White).

Johnson County's Black Population

2,332 residents of Johnson County, or 4.3% of the population, identify as Black. The share of Black residents in Johnson County is lower than in Missouri overall, where 10.9% of the population is Black. Johnson County ranks 29th statewide in terms of Black residents as a share of the population, out of 115 counties.

Since the 2020 Census, Johnson County's Black population has remained roughly the same. Black residents' share of Johnson County's population has remained roughly unchanged at 4.3%.

Johnson County is more Black than neighboring Lafayette County (1.6% Black), Henry County (0.8% Black), and Pettis County (2.5% Black). Johnson County is less Black than neighboring Cass County (4.6% Black), and Jackson County (22% Black).

Johnson County's Asian Population

830 residents of Johnson County, or 1.5% of the population, identify as Asian. The share of Asian residents in Johnson County is comparable to the share in Missouri overall, where 2.1% of the population is Asian. Johnson County ranks 16th statewide in terms of Asian residents as a share of the population, out of 115 counties.

Since the 2020 Census, Johnson County's Asian population has grown by an estimated 1.1%. Asian residents' share of Johnson County's population has remained roughly unchanged at 1.5%.

Johnson County is more Asian than neighboring Lafayette County (0.4% Asian), Henry County (0.2% Asian), Pettis County (0.7% Asian), and Cass County (0.8% Asian). Johnson County is less Asian than neighboring Jackson County (1.8% Asian).

Johnson County's Hispanic Population

2,821 residents of Johnson County, or 5.2% of the population, identify as Hispanic. The share of Hispanic residents in Johnson County is comparable to the share in Missouri overall, where 5.2% of the population is Hispanic. Johnson County ranks 20th statewide in terms of Hispanic residents as a share of the population, out of 115 counties.

Since the 2020 Census, Johnson County's Hispanic population has grown by an estimated 8.7%. Hispanic residents' share of Johnson County's population has remained roughly unchanged at 5.2%.

Johnson County is more Hispanic than neighboring Lafayette County (3.5% Hispanic), and Henry County (3% Hispanic). Johnson County is less Hispanic than neighboring Pettis County (9.9% Hispanic), Cass County (5.5% Hispanic), and Jackson County (11.4% Hispanic).

Johnson County's Native American/Other Population

575 residents of Johnson County, or 1.1% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Johnson County is comparable to the share in Missouri overall, where 0.7% of the population is Native American/Other. Johnson County ranks 10th statewide in terms of Native American/Other residents as a share of the population, out of 115 counties.

Since the 2020 Census, Johnson County's Native American/Other population has declined by an estimated 14.4%. Native American/Other residents' share of Johnson County's population has remained roughly unchanged at 1.1%.

Johnson County is more Native American/Other than neighboring Lafayette County (0.8% Native American/Other), Henry County (0.2% Native American/Other), Pettis County (0.6% Native American/Other), and Jackson County (0.9% Native American/Other).

Johnson County's Multiracial Population

2,353 residents of Johnson County, or 4.3% of the population, identify as Multiracial. The share of Multiracial residents in Johnson County is comparable to the share in Missouri overall, where 4.8% of the population is Multiracial. Johnson County ranks 7th statewide in terms of Multiracial residents as a share of the population, out of 115 counties.

Since the 2020 Census, Johnson County's Multiracial population has declined by an estimated 26.5%. Multiracial residents' share of Johnson County's population has decreased from 5.9% to 4.3%.

Johnson County is more Multiracial than neighboring Lafayette County (4% Multiracial), and Pettis County (4.2% Multiracial). Johnson County is less Multiracial than neighboring Henry County (4.5% Multiracial), Cass County (4.4% Multiracial), and Jackson County (4.6% 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.