Zip Code 63303
Saint Charles, Missouri — St. Charles County
📍 ZIP code 63303 is in Saint Charles, St. Charles County, Missouri.
ZIP code 63303 is located in Saint Charles, St. Charles County, Missouri. It is a zip code in the Central (CST/CDT) Time Zone with an estimated population of 46,627. The area code for ZIP code 63303 is 636.
Quick Answer
Zip code 63303 is in Saint Charles, Missouri (St. Charles County). It has a population of 46,627, median household income of $98,031, and median home value of $301,700.
Population
46,627
Income
$98,031
Home Value
$301,700
Climate
88°F / 21°F
About Zip Code 63303
Zip code 63303 is located in Saint Charles, Missouri, within St. Charles County. Home to approximately 46,627 residents, this area sits at an elevation of 534 ft and falls within the Central (CST/CDT) timezone. The local area code is 636.
The median household income is $98,031 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $301,700, and the cost of living index is 111 (11% above the national average of 100).
Summers average a high of 88°F while winters drop to 21°F. The area receives about 42 in of rain and 15 in of snow annually. The zip code covers 19.8 square miles of land area and 1.5 square miles of water.
Key Statistics
46,627
$98,031
$301,700
Central (CST/CDT)
636
534 ft
19.8 sq mi
41.2
21,448
Advertisement
Compare With Nearby Zip Codes
| Metric | 63303 | 63043 | 63146 | 63017 | 63376 | 63044 |
|---|---|---|---|---|---|---|
| City | Saint Charles, MO | Maryland Heights, MO | Saint Louis, MO | Chesterfield, MO | Saint Peters, MO | Bridgeton, MO |
| Population | 46,627 | 21,651 | 30,917 | 43,074 | 74,876 | 10,510 |
| Median Income | $98,031 | $91,050 | $85,724 | $128,750 | $94,921 | $76,094 |
| Home Value | $301,700 | $215,900 | $283,600 | $452,000 | $255,500 | $232,200 |
| Cost of Living | 111 | 90 | 101 | 162 | 101 | 87 |
| Median Age | 41.2 | 36.6 | 39.2 | 47.6 | 41 | 44 |
Cost of Living
100 = National Average. Saint Charles's cost of living is 11% above the national average.
vs. State Avg
Above
Affordability
Moderate
Income-to-Home
3.1x
Demographics
Zip code 63303 has a population of 46,627 people with a median age of 41.2. There are 21,448 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Saint Charles (63303) population trend from 2010 to 2024
↑ 41.0%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
88°F
21°F
42 in
15 in
Saint Charles experiences warm summers with average highs around 88°F. Winters are cool with lows averaging 21°F. The area receives about 15 in of snow per year.
Advertisement
Housing & Economy
Median Home Value
$301,700
Median Household Income
$98,031
With 21,448 housing units across 19.8 square miles, 63303 has a housing density of 1,083 units per square mile. The home price-to-income ratio is 3.1x.
Location & Geography
Latitude
38.7398°
Longitude
-90.5437°
Land Area
19.8 sq mi
Water Area
1.5 sq mi
Nearby Zip Codes
Zip codes closest to 63303 (Saint Charles, MO) with distances:
All Zip Codes in Saint Charles, MO
Other zip codes serving Saint Charles:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 63303's $98,031. A way to compare Saint Charles to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 63303 (Saint Charles, MO). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
Explore Missouri
Popular "Near Me" Searches
Advertisement
People Also Ask
What zip code is Saint Charles, Missouri?
Saint Charles, Missouri uses zip code 63303 along with 2 other zip codes.
What county is zip code 63303 in?
Zip code 63303 is located in St. Charles County, Missouri.
What is the population of zip code 63303?
The population of zip code 63303 is 46,627 with a median age of 41.2.
Is 63303 in Saint Charles, Missouri?
Yes, zip code 63303 is in Saint Charles, St. Charles County, Missouri. The area code is 636.
Frequently Asked Questions
What city is zip code 63303 in?
Zip code 63303 is in Saint Charles, Missouri. It is part of St. Charles County and uses the Central (CST/CDT) timezone.
What is zip code 63303?
Zip code 63303 is a U.S. postal code in Saint Charles, Missouri (St. Charles County). It has a population of 46,627 and covers 19.8 square miles.
What is the population of zip code 63303?
The population of zip code 63303 (Saint Charles, MO) is 46,627 with a median age of 41.2. There are approximately 21,448 housing units in this area.
What is the median income in zip code 63303?
The median household income in zip code 63303 (Saint Charles, MO) is $98,031 per year. The cost of living index is 111 (100 = national average).
What is the average home price in zip code 63303?
The median home value in zip code 63303 (Saint Charles, MO) is $301,700. The cost of living index is 111 compared to the national average of 100.
What county is zip code 63303 in?
Zip code 63303 is located in St. Charles County, Missouri. The primary city is Saint Charles.
What is the area code for zip code 63303?
Zip code 63303 in Saint Charles, MO uses area code 636. It is located in the Central (CST/CDT) timezone.
Is zip code 63303 a good place to live?
Zip code 63303 (Saint Charles, MO) has a cost of living index of 111 (100 = national average), a median household income of $98,031, and median home values of $301,700. The median age is 41.2. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 63303?
The cost of living index for zip code 63303 (Saint Charles, MO) is 111, where 100 represents the national average. This area is above the national average. Median home value: $301,700.
What schools serve zip code 63303?
Zip code 63303 in Saint Charles, Missouri is served by the local school district of St. Charles County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
People Also Searched For
Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.