St. Louis County, Missouri

2024 results by precinct

952 precincts · 502,738 votes cast

Harris · D+23

Harris +50

Trump +50

Real precinct boundaries. Hover for vote totals.

38 presidential elections

Year	Won	Margin	Democratic	Republican	Total
2024	D	+23.4%	305,635	187,982	502,738
2020	D	+24.0%	328,151	199,493	536,446
2016	D	+16.2%	286,704	202,434	519,686
2012	D	+13.6%	297,097	224,742	530,116
2008	D	+19.9%	333,123	221,705	559,854
2004	D	+9.3%	295,284	244,969	542,983
2000	D	+5.3%	250,631	224,689	486,884
1996	D	+6.4%	225,524	196,096	462,278
1992	D	+8.9%	235,760	188,285	534,763
1988	R	−9.6%	216,534	262,784	480,682
1984	R	−28.0%	173,144	307,684	480,828
1980	R	−14.6%	192,796	263,518	484,831
1976	R	−11.1%	196,915	246,988	452,626
1972	R	−24.3%	160,801	264,147	424,948
1968	R	−3.8%	165,786	180,355	385,375
1964	D	+22.6%	213,658	134,962	348,620
1960	D	+2.6%	166,508	157,992	324,500
1956	R	−6.2%	121,881	138,111	259,992
1952	R	−10.1%	95,457	116,821	212,480
1948	R	−5.2%	62,684	69,592	133,383
1944	R	−5.2%	57,780	64,131	122,266
1940	R	−12.1%	52,380	66,909	119,747
1936	D	+15.8%	63,226	45,541	112,100
1932	D	+23.6%	59,044	35,872	98,257
1928	R	−11.4%	33,802	42,572	76,667
1924	R	−22.1%	16,075	26,669	47,834
1920	R	−32.0%	12,438	25,008	39,342
1916	R	−23.7%	7,587	12,485	20,666
1912	R	−4.9%	5,409	6,177	15,526
1908	R	−36.9%	4,522	10,177	15,326
1904	R	−42.4%	2,870	7,375	10,619
1900	R	−25.3%	3,864	6,537	10,573
1896	R	−29.0%	3,403	6,210	9,689
1892	R	−16.6%	3,116	4,367	7,552
1888	—	No data	—	—	—
1884	—	No data	—	—	—
1880	—	No data	—	—	—
1876	—	No data	—	—	—

Demographics

Race, ethnicity, and ancestry

Click any group to see the ancestries typically reported within it.

American

100.0%

Polish

0.5%

African American

19.3%

Multiple ancestry combinations reported; no single grouping above 1%.

American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.

Source · American Community Survey 5-year estimates, 2024 release. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.

Age distribution by sex

Median age: 40.3 in this county, 39.1 nationally

Male

Age

Female

0.8%

85+

1.6%

2.4%

75–84

3.2%

5.0%

65–74

6.1%

6.3%

55–64

7.0%

5.6%

45–54

6.2%

35–44

6.6%

6.2%

25–34

6.5%

4.2%

18–24

4.2%

8.4%

5–17

8.0%

2.9%

2.7%

Source · American Community Survey 5-year estimates, 2024 release.

Median household income

2024 inflation-adjusted dollars

$82,936

St. Louis County ranks in the top 25% of US counties.

St. Louis County$82,936

Missouri$70,702

United States$80,734

Source · American Community Survey 5-year estimates, 2024 release.

Poverty rate

All persons below federal poverty line

9.8%

Children face moderate poverty.

Children under 1818.0%

Working age (18–64)100.0%

Seniors (65+)18.0%

Source · American Community Survey 5-year estimates, 2024 release.

Language at home

Population aged 5 and older

0.0%

speak English only

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Catholic & Orthodox

25.9%

Other Christian

10.0%

Baptist

5.1%

Mainline Protestant

3.2%

Non-Christian

2.7%

Methodist

2.1%

Pentecostal & Holiness

1.7%

Source · 2020 US Religion Census. Remaining 49.3% of residents not counted as adherents by any reporting body.

With over a million residents and a 23-point Democratic lean in 2024, St. Louis County functions as the state's largest counterweight to rural Republican dominance, shaped by a mix of inner-ring suburbs and diverse urban communities.

The Democratic margin in St. Louis County has been steady. It reached its modern peak at twenty-four points in 2020; the 2024 margin was twenty-three points, still in line with the county's long pattern.

St. Louis County's political identity is inseparable from its demographic profile: a 62% non-Hispanic-white share, a median household income of $82,936, and the full diversity of a major metropolitan center. The county's voting pattern resembles other major urban centers most closely — Gunnison County and Summit County.

Most similar counties

St. Louis County is one of the bluest places in America.