Zip Code 63304
Saint Charles, Missouri — St. Charles County
📍 ZIP code 63304 is in Saint Charles, St. Charles County, Missouri.
ZIP code 63304 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 43,389. The area code for ZIP code 63304 is 636.
Quick Answer
Zip code 63304 is in Saint Charles, Missouri (St. Charles County). It has a population of 43,389, median household income of $114,124, and median home value of $331,300.
Population
43,389
Income
$114,124
Home Value
$331,300
Climate
88°F / 21°F
About Zip Code 63304
Zip code 63304 is located in Saint Charles, Missouri, within St. Charles County. Home to approximately 43,389 residents, this area sits at an elevation of 580 ft and falls within the Central (CST/CDT) timezone. The local area code is 636.
The median household income is $114,124 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $331,300, and the cost of living index is 124 (24% above the national average of 100).
Summers average a high of 88°F while winters drop to 21°F. The area receives about 44 in of rain and 14 in of snow annually. The zip code covers 41.9 square miles of land area and 3 square miles of water.
Key Statistics
43,389
$114,124
$331,300
Central (CST/CDT)
636
580 ft
41.9 sq mi
41.3
16,665
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Compare With Nearby Zip Codes
| Metric | 63304 | 63005 | 63303 | 63376 | 63017 | 63341 |
|---|---|---|---|---|---|---|
| City | Saint Charles, MO | Chesterfield, MO | Saint Charles, MO | Saint Peters, MO | Chesterfield, MO | Defiance, MO |
| Population | 43,389 | 19,679 | 46,627 | 74,876 | 43,074 | 3,554 |
| Median Income | $114,124 | $202,232 | $98,031 | $94,921 | $128,750 | $177,583 |
| Home Value | $331,300 | $671,300 | $301,700 | $255,500 | $452,000 | $552,600 |
| Cost of Living | 124 | 235 | 111 | 101 | 162 | 177 |
| Median Age | 41.3 | 45.9 | 41.2 | 41 | 47.6 | 47.7 |
Cost of Living
100 = National Average. Saint Charles's cost of living is 24% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
2.9x
Demographics
Zip code 63304 has a population of 43,389 people with a median age of 41.3. There are 16,665 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Saint Charles (63304) population trend from 2010 to 2024
↓ -10.7%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
88°F
21°F
44 in
14 in
Saint Charles experiences warm summers with average highs around 88°F. Winters are cool with lows averaging 21°F. The area receives about 14 in of snow per year.
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Housing & Economy
Median Home Value
$331,300
Median Household Income
$114,124
With 16,665 housing units across 41.9 square miles, 63304 has a housing density of 398 units per square mile. The home price-to-income ratio is 2.9x.
Location & Geography
Latitude
38.7035°
Longitude
-90.6675°
Land Area
41.9 sq mi
Water Area
3 sq mi
Nearby Zip Codes
Zip codes closest to 63304 (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 63304's $114,124. 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 63304 (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.
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People Also Ask
What zip code is Saint Charles, Missouri?
Saint Charles, Missouri uses zip code 63304 along with 2 other zip codes.
What county is zip code 63304 in?
Zip code 63304 is located in St. Charles County, Missouri.
What is the population of zip code 63304?
The population of zip code 63304 is 43,389 with a median age of 41.3.
Is 63304 in Saint Charles, Missouri?
Yes, zip code 63304 is in Saint Charles, St. Charles County, Missouri. The area code is 636.
Frequently Asked Questions
What city is zip code 63304 in?
Zip code 63304 is in Saint Charles, Missouri. It is part of St. Charles County and uses the Central (CST/CDT) timezone.
What is zip code 63304?
Zip code 63304 is a U.S. postal code in Saint Charles, Missouri (St. Charles County). It has a population of 43,389 and covers 41.9 square miles.
What is the population of zip code 63304?
The population of zip code 63304 (Saint Charles, MO) is 43,389 with a median age of 41.3. There are approximately 16,665 housing units in this area.
What is the median income in zip code 63304?
The median household income in zip code 63304 (Saint Charles, MO) is $114,124 per year. The cost of living index is 124 (100 = national average).
What is the average home price in zip code 63304?
The median home value in zip code 63304 (Saint Charles, MO) is $331,300. The cost of living index is 124 compared to the national average of 100.
What county is zip code 63304 in?
Zip code 63304 is located in St. Charles County, Missouri. The primary city is Saint Charles.
What is the area code for zip code 63304?
Zip code 63304 in Saint Charles, MO uses area code 636. It is located in the Central (CST/CDT) timezone.
Is zip code 63304 a good place to live?
Zip code 63304 (Saint Charles, MO) has a cost of living index of 124 (100 = national average), a median household income of $114,124, and median home values of $331,300. The median age is 41.3. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 63304?
The cost of living index for zip code 63304 (Saint Charles, MO) is 124, where 100 represents the national average. This area is above the national average. Median home value: $331,300.
What schools serve zip code 63304?
Zip code 63304 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.
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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.