🇺🇸 United States ZIP Code

STANDARD

63109

Saint Louis

ZIP Code 63109 is a standard zip code serving Saint Louis, Saint Louis, Missouri (MO), in St. Louis (city) County, United States. It has an estimated population of 26,946 with a median household income of $51,951. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Missouri (MO)
County: St. Louis (city)
City: Saint Louis
Timezone: America/Chicago

Coordinates

Latitude: 38.585500
Longitude: -90.292900

Geographic Details

Land Area: 3.57 mi²
Water Area: 0.07 mi²
Population Density: 7546.0 people per mi² (95th percentile)
Bounding Box: 38.599859°N, 38.563477°S, -90.270885°E, -90.320515°W

With 26,946 residents spread across 3.57 square miles, this area has a population density of 7546.0 people per square mile.

Demographics

26,946

Population

85th percentile

$51,951

Median Income

55th percentile

$163,400

Median Home Value

65th percentile

3.57 mi²

Land Area

The median household income in 63109 is $51,951, and the median home value is $163,400.

Housing

14,884

Total Units

13,512

Occupied Units

90.8%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Saint Louis, MO.

63101

Saint Louis

63102

Saint Louis

63103

Saint Louis

63104

Saint Louis

63105

Saint Louis

63106

Saint Louis

63107

Saint Louis

63108

Saint Louis

63110

Saint Louis

63111

Saint Louis

Similar ZIP Codes in Missouri

ZIP codes with similar median household income in Missouri.

65085

Westphalia

$56,250

65043

Holts Summit

$54,063

64020

Concordia

$55,109

64057

Independence

$58,500

65254

Glasgow

$46,061

64112

Kansas City

$54,679

63050

Hillsboro

$56,330

65742

Rogersville

$52,789

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.