St. Charles County Demographics

A map of St. Charles County's Population by Race

St. Charles County, Missouri had a population of 405,262 in 2020. It was 82.9% White, 5.1% Black, 2.7% Asian, 4.0% Hispanic, 0.5% Native American/Other, and 4.8% Multiracial. This map presents the population of St. Charles County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

St. Charles County is the 3rd most populous county of the 115 counties in Missouri.

St. Charles County's White Population

335,879 residents of St. Charles County identify as White, or 82.9%. This makes the White share of the population of St. Charles County slightly larger than the White share of the population of Missouri (75.8% White). Of the 115 counties in Missouri, St. Charles County is ranked #91 in terms of White residents as a share of the population.

St. Charles County is more White than neighboring St. Louis County (62.2% White), and St. Louis County (42.9% White). St. Charles County is less White than neighboring Calhoun County (95% White), Lincoln County (89.1% White), and Jersey County (93.5% White).

St. Charles County's Black Population

20,672 residents of St. Charles County identify as Black, or 5.1%. This makes the Black share of the population of St. Charles County slightly less than the Black share of the population of Missouri (11.3% Black). Of the 115 counties in Missouri, St. Charles County is ranked #22 in terms of Black residents as a share of the population.

St. Charles County is more Black than neighboring Calhoun County (0.2% Black), Lincoln County (1.8% Black), and Jersey County (0.7% Black). St. Charles County is less Black than neighboring St. Louis County (24.4% Black), and St. Louis County (42.8% Black).

St. Charles County's Asian Population

11,068 residents of St. Charles County identify as Asian, or 2.7%. This makes the Asian share of the population of St. Charles County roughly similar to the Asian share of the population of Missouri (2.1% Asian). Of the 115 counties in Missouri, St. Charles County is ranked #6 in terms of Asian residents as a share of the population.

St. Charles County is more Asian than neighboring Calhoun County (0.2% Asian), Lincoln County (0.4% Asian), and Jersey County (0.3% Asian). St. Charles County is less Asian than neighboring St. Louis County (4.8% Asian), and St. Louis County (4% Asian).

St. Charles County's Hispanic Population

16,011 residents of St. Charles County identify as Hispanic, or 4.0%. This makes the Hispanic share of the population of St. Charles County roughly similar to the Hispanic share of the population of Missouri (4.9% Hispanic). Of the 115 counties in Missouri, St. Charles County is ranked #23 in terms of Hispanic residents as a share of the population.

St. Charles County is more Hispanic than neighboring St. Louis County (3.7% Hispanic), Calhoun County (1.4% Hispanic), Lincoln County (2.6% Hispanic), and Jersey County (1.5% Hispanic). St. Charles County is less Hispanic than neighboring St. Louis County (5.1% Hispanic).

St. Charles County's Native American/Other Population

2,199 residents of St. Charles County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.5%. This makes the Native American/Other share of the population of St. Charles County roughly similar to the Native American/Other share of the population of Missouri (0.9% Native American/Other). Of the 115 counties in Missouri, St. Charles County is ranked #77 in terms of Native American/Other residents as a share of the population.

St. Charles County is more Native American/Other than neighboring Calhoun County (0.2% Native American/Other), and Jersey County (0.3% Native American/Other). St. Charles County is less Native American/Other than neighboring St. Louis County (0.6% Native American/Other), Lincoln County (0.7% Native American/Other), and St. Louis County (0.8% Native American/Other).

St. Charles County's Multiracial Population

19,433 residents of St. Charles County identify as Multiracial, or 4.8%. This makes the Multiracial share of the population of St. Charles County roughly similar to the Multiracial share of the population of Missouri (5% Multiracial). Of the 115 counties in Missouri, St. Charles County is ranked #49 in terms of Multiracial residents as a share of the population.

St. Charles County is more Multiracial than neighboring St. Louis County (4.2% Multiracial), Calhoun County (3% Multiracial), Jersey County (3.7% Multiracial), and St. Louis County (4.4% Multiracial). St. Charles County is less Multiracial than neighboring Lincoln County (5.5% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.