ZIP Code Tabulation Area · Missouri

ZIP Code 63123: Affton, MO

ZIP Code 63123 (Affton, St. Louis County, Missouri) has an estimated 49,077 residents in 21,755 households. The median household income is $77,055, the median home value is $219,400 and the median gross rent is $1,006/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated

Total population

49,077

Margin of error ±1,858

Median household income

$77,055

Margin of error ±$3,496

Median home value

$219,400

Margin of error ±$4,585

Median gross rent

$1,006/mo

Margin of error ±$46

Median age

40.9 yrs

Margin of error ±1.0 yrs

Mean travel time to work

23.7 min

Margin of error ±2.0 min

How ZIP 63123 compares with Missouri and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 6312340.9 yrsMissouri39.0 yrsUnited States38.9 yrs

Median household income

ZIP 63123$77,055Missouri$70,702United States$80,734

Per capita income

ZIP 63123$44,373Missouri$39,695United States$44,673

Poverty rate

ZIP 631237.9%Missouri12.6%United States12.5%

Unemployment rate

ZIP 631232.2%Missouri4.0%United States5.2%

Bachelor's degree or higher

ZIP 6312337.6%Missouri32.4%United States35.7%

Median home value

ZIP 63123$219,400Missouri$230,300United States$332,700

Median gross rent

ZIP 63123$1,006/moMissouri$1,033/moUnited States$1,413/mo

Owner-occupied homes

ZIP 6312374.9%Missouri68.1%United States65.2%

Mean travel time to work

ZIP 6312323.7 minMissouri23.5 minUnited States26.4 min

Worked from home

ZIP 6312313.3%Missouri13.0%United States15.1%

All figures for ZIP 63123

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 63123 — ACS 2020–2024 5-year estimates
MeasureZIP 63123Margin of errorMissouriUnited States
Total population49,077±1,8586,191,814334,922,499
Median age40.9 yrs±1.0 yrs39.0 yrs38.9 yrs
Households21,755±8512,508,227129,227,496
Median household income$77,055±$3,496$70,702$80,734
Per capita income$44,373±$2,363$39,695$44,673
Poverty rate7.9%±1.4 pts12.6%12.5%
Unemployment rate2.2%±0.8 pts4.0%5.2%
Bachelor's degree or higher37.6%±1.6 pts32.4%35.7%
Median home value$219,400±$4,585$230,300$332,700
Median gross rent$1,006/mo±$46$1,033/mo$1,413/mo
Owner-occupied homes74.9%±1.8 pts68.1%65.2%
Mean travel time to work23.7 min±2.0 min23.5 min26.4 min
Worked from home13.3%±1.5 pts13.0%15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 63123
GroupZIP 63123MissouriUnited States
White alone, not Hispanic or Latino81.6%76.3%57.4%
Black or African American alone, not Hispanic or Latino3.8%10.9%11.9%
American Indian and Alaska Native alone, not Hispanic or Latino0.1%0.2%0.5%
Asian alone, not Hispanic or Latino4.7%2.1%5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino0.0%0.1%0.2%
Some other race alone, not Hispanic or Latino0.2%0.4%0.6%
Two or more races, not Hispanic or Latino5.4%4.8%4.3%
Hispanic or Latino (of any race)4.1%5.2%19.3%

Where ZIP 63123 is

State
Missouri
Main county
St. Louis County— also overlaps St. Louis city
Largest overlapping place
Affton (37% of the ZIP's land area)
Land area
12.45 sq mi· about 3,942 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in St. Louis County

63105 Clayton, MO63114 Overland, MO63117 Richmond Heights, MO63119 Webster Groves, MO63121 Normandy, MO63122 Kirkwood, MO63124 Ladue, MO63125 Lemay, MO63126 Crestwood, MO63127 Sunset Hills, MO63128 Concord, MO63129 Oakville, MO63130 University City, MO63131 Town and Country, MO63132 Olivette, MO63133 Pagedale, MO63134 Berkeley, MO63135 Ferguson, MO63136 Jennings, MO63137 Bellefontaine Neighbors, MO63138 Spanish Lake, MO63140 Kinloch, MO63141 Creve Coeur, MO63143 Maplewood, MO

See every ZIP code in Missouri, or compare ZIP 63123 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
  • U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
  • Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.