Affton

Population: 20,035
Median household income: $77,337
Median home value: $200,300

Located in St. Louis County, Missouri, Affton is a community with a population of 20,035. At $77,337, its median household income sits below St. Louis County's $81,340.

From 2019 to 2023, Affton's population held roughly steady from 20,148 to 20,035, while its median home value rose 34.2% from $149,300 to $200,300.

The median resident is 41.7 years old. The largest age group is 55 to 64, 15.1% of residents.

Demographics

ACS 2019–2023

Population: 20,035
Median age: 41.7 yrs
Median household income: $77,337
Median home value: $200,300
Median gross rent: $978
Housing units: 9,278
Homeownership rate: 80.5%
Bachelor's degree or higher: 35.0%
Unemployment rate: 2.5%

Trends

ACS 5-year · 2019–2023

Population

20,14820,035

Median household income

$60,969$77,337

Median home value

$149,300$200,300

Median gross rent

$885$978

Year	Population	Median household income	Median home value	Median gross rent
2019	20,148	$60,969	$149,300	$885
2020	19,580	$68,555	$158,600	$857
2021	18,925	$70,330	$164,500	$889
2022	19,922	$75,237	$185,400	$961
2023	20,035	$77,337	$200,300	$978

Each year is a US Census Bureau ACS 5-year estimate ending that year.

Age distribution

Under 56.3%

5 to 1712.4%

18 to 247.2%

25 to 3413.6%

35 to 4414.9%

45 to 5411.4%

55 to 6415.1%

65 to 7411.4%

75 and over7.7%

	Count	Share
Under 5	1,256	6.3%
5 to 17	2,494	12.4%
18 to 24	1,440	7.2%
25 to 34	2,724	13.6%
35 to 44	2,982	14.9%
45 to 54	2,288	11.4%
55 to 64	3,034	15.1%
65 to 74	2,279	11.4%
75 and over	1,538	7.7%

Race & ethnicity

	Count	Share
White (non-Hispanic)	16,074	80.2%
Black or African American	579	2.9%
American Indian & Alaska Native	0	0.0%
Asian	871	4.3%
Native Hawaiian & Pacific Islander	0	0.0%
Some other race	21	0.1%
Two or more races	1,317	6.6%
Hispanic or Latino (any race)	1,173	5.9%

Educational attainment (age 25+)

No high school diploma7.4%

High school graduate23.6%

Some college or associate's34.0%

Bachelor's degree20.5%

Graduate or professional degree14.5%

	Count	Share
No high school diploma	1,103	7.4%
High school graduate	3,498	23.6%
Some college or associate's	5,051	34.0%
Bachelor's degree	3,037	20.5%
Graduate or professional degree	2,156	14.5%

Commute to work

Mean travel time to work: 23 min

Drove alone76.2%

Carpooled11.2%

Public transit0.7%

Walked0.8%

Bicycle0.2%

Worked from home9.4%

Other means1.5%

How workers get to work

	Count	Share
Drove alone	8,735	76.2%
Carpooled	1,285	11.2%
Public transit	79	0.7%
Walked	94	0.8%
Bicycle	19	0.2%
Worked from home	1,078	9.4%
Other means	172	1.5%

Travel time

	Count	Share
Under 15 min	2,362	22.7%
15 to 29 min	4,898	47.2%
30 to 44 min	2,171	20.9%
45 to 59 min	690	6.6%
60+ min	263	2.5%

Households

Average household size: 2.26
Poverty rate: 5.6% (1,111 of 19,993)

	Count	Share
Family households	5,227	59.0%
Nonfamily households	3,635	41.0%

Housing

Median year structure built: 1959

Occupancy

	Count	Share
Occupied	8,862	95.5%
Vacant	416	4.5%

Tenure (of occupied units)

	Count	Share
Owner-occupied	7,138	80.5%
Renter-occupied	1,724	19.5%

1-unit, detached83.5%

1-unit, attached2.0%

2 to 4 units6.8%

5 to 19 units5.1%

20 or more units2.5%

Mobile home & other0.1%

Units in structure

	Count	Share
1-unit, detached	7,743	83.5%
1-unit, attached	190	2.0%
2 to 4 units	627	6.8%
5 to 19 units	475	5.1%
20 or more units	233	2.5%
Mobile home & other	10	0.1%

Geography

Place GEOID: 2900280
Type (LSAD): 57
Land area: 4.57 sq mi
Water area: 0 sq mi
Center point: 38.5499, -90.3264