63303 ZIP Code — Saint Charles, MO
Saint Charles County, Missouri
ZIP code 63303 is located in Saint Charles, Missouri, within Saint Charles County. It covers approximately 19.75 square miles and serves a population of 47,285 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 636.
About ZIP code 63303
The housing stock consists of a mix of housing types. Most homes were built in the 1980s, giving the area an established character. Median home value is $283,100. Owner-occupancy sits near the national average at 74%.
The gap between median ($94,658) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 5% is below the national average.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 22 minutes is near the national average.
Educational attainment is high — 49% of residents hold a bachelor's degree or higher, well above the national average of 33%.
47,285
population
19.75
sq mi land
Standard
ZIP type
Central (CT)
timezone
63303 ZIP code map
Cities in ZIP code 63303
Below are the cities the US Postal Service accepts for ZIP code 63303. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Saint Charles | Acceptable |
| Saint Charles | Preferred |
Nearby ZIP codes
63043 Maryland Heights (4.2 mi)
63043 Maryland Heights (4.2 mi)
63146 Saint Louis (4.2 mi)
63146 Saint Louis (4.2 mi)
63017 Chesterfield (4.5 mi)
63017 Chesterfield (4.5 mi)
63044 Bridgeton (6.3 mi)
63044 Bridgeton (6.3 mi)
63376 Saint Peters (6.5 mi)
63376 Saint Peters (6.5 mi)
63376 Saint Peters (6.5 mi)
63376 Saint Peters (6.5 mi)
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 47,285 |
| Population density | 2,394 / sq mi |
| State FIPS | 29 |
| County FIPS | 183 |
| Geography | |
|---|---|
| Land area | 19.75 sq mi |
| Water area | 1.49 sq mi |
| Latitude | 38.7374 |
| Longitude | -90.5325 |
| Timezone | Central (CT) |
| Area code | 636 |
Total population by age
Gender
Race & ethnicity
Economics
updated 06/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 26.5% | 24.9% | 43.8% |
| $50k – $100k | 34.0% | 32.4% | 31.5% |
| $100k – $200k | 27.8% | 33.0% | 19.5% |
| Over $200k | 11.7% | 9.7% | 5.2% |
Demographics & statistics
47,285
Population
2,394
People per sq mi
40.8
Median age
$94,658
Median household income
$54,591
Per capita income
$283,100
Median home value
$1,236
Median monthly rent
74.1%
Home ownership
4.6%
Poverty rate
2.0%
Unemployment
16,258
Housing units
48.6%
Bachelor's or higher
Age distribution
Male
Female
1,258
Under 5
1,303
1,313
5–9
1,361
1,205
10–14
1,248
939
15–19
973
1,211
20–24
1,254
3,837
25–34
3,976
2,904
35–44
3,009
2,542
45–54
2,635
1,900
55–59
1,969
1,976
60–64
2,048
2,393
65–74
2,479
1,269
75–84
1,315
475
85+
493
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 9,084 | 19.2% |
| 18 and over | 38,201 | 80.8% |
| 65 and over | 8,424 | 17.8% |
| Median age | 40.8 years | |
Race & ethnicity
White
78.8%
Black or African American
6.7%
Two or more races
4.7%
Asian
4.7%
Hispanic or Latino
3.2%
Other race
1.7%
American Indian / Alaska Native
0.2%
Native Hawaiian / Pacific Islander
0.1%
| Group | Count | % |
|---|---|---|
| White | 38,476 | 78.8% |
| Black or African American | 3,250 | 6.7% |
| Two or more races | 2,294 | 4.7% |
| Asian | 2,271 | 4.7% |
| Hispanic or Latino | 1,547 | 3.2% |
| Other race | 832 | 1.7% |
| American Indian / Alaska Native | 100 | 0.2% |
| Native Hawaiian / Pacific Islander | 62 | 0.1% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 26.5% | 24.9% | 43.8% |
| $50k – $100k | 34.0% | 32.4% | 31.5% |
| $100k – $200k | 27.8% | 33.0% | 19.5% |
| Over $200k | 11.7% | 9.7% | 5.2% |
Under $10k
2.4%
$10k–$15k
1.1%
$15k–$25k
3.2%
$25k–$35k
4.6%
$35k–$50k
9.3%
$50k–$75k
17.9%
$75k–$100k
14.8%
$100k–$150k
20.2%
$150k–$200k
11.4%
$200k+
15.0%
| Range | % of households |
|---|---|
| Under $10k | 2.4% |
| $10k–$15k | 1.1% |
| $15k–$25k | 3.2% |
| $25k–$35k | 4.6% |
| $35k–$50k | 9.3% |
| $50k–$75k | 17.9% |
| $75k–$100k | 14.8% |
| $100k–$150k | 20.2% |
| $150k–$200k | 11.4% |
| $200k+ | 15.0% |
| Median income | $94,658 |
Housing
Home values
Under $50k
3.5%
$50k–$100k
2.5%
$100k–$150k
4.2%
$150k–$200k
13.5%
$200k–$300k
31.7%
$300k–$500k
36.5%
$500k–$1M
7.0%
$1M+
1.1%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $283,100 |
| Median rent / month | $1,236 |
| Owner occupied | 74.1% |
| Renter occupied | 25.9% |
| Vacant | 4.3% |
| Single-family detached | 63.4% |
| Large apartment buildings | 7.5% |
| Mobile homes | 2.2% |
| Median rooms | 6.1 |
| Avg household size (owned) | 2.45 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.5% |
| 2010–2019 | 9.1% |
| 2000–2009 | 14.6% |
| 1990–1999 | 22.6% |
| 1980–1989 | 23.5% |
| 1970–1979 | 15.3% |
| 1960–1969 | 8.4% |
| 1950–1959 | 4.2% |
| 1940–1949 | 0.6% |
| 1939 or earlier | 1.2% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 2.1% |
| 1 bedroom | 7.8% |
| 2 bedrooms | 23.3% |
| 3 bedrooms | 36.6% |
| 4 bedrooms | 25.6% |
| 5+ bedrooms | 4.6% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 3.3% |
| 1 vehicle | 30.7% |
| 2 vehicles | 45.6% |
| 3 or more | 20.5% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 65.8% |
| Electricity | 32.9% |
| Propane / LP gas | 0.8% |
| Wood | 0.2% |
| No fuel used | 0.2% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 10,930 | 52.9% |
| Cohabiting couple | 1,262 | 6.1% |
| Male householder, no spouse | 3,432 | 16.6% |
| Female householder, no spouse | 5,040 | 24.4% |
| Households with children under 18 | 4,821 | 23.3% |
| Households with seniors (65+) | 5,826 | 28.2% |
| Average household size | 2.27 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 28.4% | 24.6% |
| Married | 60.3% | 54.2% |
| Separated | 0.6% | 0.7% |
| Widowed | 2.0% | 8.7% |
| Divorced | 8.7% | 11.9% |
Education
Less than 9th grade
0.8%
Some HS, no diploma
3.2%
HS graduate
20.8%
Some college, no degree
18.8%
Associate's degree
7.9%
Bachelor's degree
30.9%
Graduate / professional
17.7%
| Metric | % |
|---|---|
| HS diploma or higher | 96.0% |
| Bachelor's or higher | 48.6% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 854 | 9.3% |
| Kindergarten | 397 | 4.3% |
| Elementary school | 4,082 | 44.5% |
| High school | 1,690 | 18.4% |
| College / grad school | 2,152 | 23.5% |
Employment
Industry of employment
Education & healthcare
22.1%
Manufacturing
14.2%
Professional & management
14.0%
Finance & real estate
12.2%
Retail trade
7.5%
Arts, food & hospitality
6.4%
Transportation & utilities
6.3%
Construction
5.7%
Other services
4.0%
Wholesale trade
2.8%
Public administration
2.6%
Information
1.9%
Agriculture & mining
0.4%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 53.9% |
| Service | 10.3% |
| Sales & office | 20.1% |
| Natural resources & construction | 6.0% |
| Production & transportation | 9.7% |
Employment type
| Type | % |
|---|---|
| Private sector | 87.0% |
| Government | 9.3% |
| Self-employed | 3.7% |
| Unpaid family workers | 0.1% |
Commute
| Method | % |
|---|---|
| Drive alone | 79.6% |
| Carpool | 4.2% |
| Public transit | 0.1% |
| Walk | 0.6% |
| Work from home | 14.7% |
| Other means | 0.9% |
| Avg commute (minutes) | 22.4 |
Poverty
All people
4.6%
Under 18 years
3.5%
18 and over
4.8%
Married-couple families
1.2%
Female-led households
7.1%
Income support
| Source | % of households |
|---|---|
| Social Security | 27.7% |
| Retirement income | 27.0% |
| Supplemental Security | 2.7% |
| Cash public assistance | 0.6% |
| Food stamps / SNAP | 2.4% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 30.6% |
| High blood pressure | 26.1% |
| High cholesterol | 31.6% |
| Diabetes | 7.7% |
| Heart disease | 5.3% |
| Stroke | 2.4% |
| Asthma | 8.6% |
| Arthritis | 22.8% |
| Kidney disease | 2.3% |
| Pulmonary disease | 5.5% |
| Cancer | 6.2% |
| Behavior / access | % |
|---|---|
| Smoking | 15.2% |
| Binge drinking | 20.7% |
| No physical activity | 20.8% |
| Less than 7 hrs sleep | 32.1% |
| Depression | 22.4% |
| Fair or poor health | 11.3% |
| Poor mental health | 14.1% |
| Poor physical health | 8.8% |
| No health insurance | 12.0% |
| Visited doctor (checkup) | 73.8% |
| Visited dentist | 66.7% |
| Cholesterol screening | 89.7% |
| Teeth loss | 11.8% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 2,373 | 6.2% |
| Disability | % |
|---|---|
| Any disability | 10.8% |
| Under 18 | 3.5% |
| 18–64 years | 8.6% |
| 65 and over | 26.2% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 83.9% |
| Public insurance | 23.6% |
| No insurance | 3.8% |
| Uninsured under 19 | 3.1% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 44,724 | 94.6% |
| Spanish | 825 | 1.8% |
| Other Indo-European | 240 | 0.5% |
| Asian & Pacific Islander | 308 | 0.7% |
| Other languages | 259 | 0.6% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 44,682 | 94.5% |
| Born in same state | 44,330 | 93.8% |
| Born in different state | 30,122 | 63.7% |
| Foreign born | 352 | 0.7% |
| Naturalized citizen | 2,603 | 5.5% |
| Not a US citizen | 1,537 | 59.0% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| Italian | 7,477 | 15.8% |
| French | 5,792 | 12.2% |
| Arab | 2,340 | 4.9% |
| English | 585 | 1.2% |
| Polish | 374 | 0.8% |
| Ancestry | Count | % |
|---|---|---|
| Dutch | 366 | 0.8% |
| Irish | 135 | 0.3% |
| German | 91 | 0.2% |
| Norwegian | 11 | 0% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 43.7% |
| Internet access | 96.8% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 63303
What city is ZIP code 63303 in?
ZIP code 63303 is primarily assigned to Saint Charles, Missouri.
What county is ZIP code 63303 in?
ZIP code 63303 falls within Saint Charles County, Missouri.
How educated is the population of ZIP code 63303?
49% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.
What is the population of ZIP code 63303?
ZIP code 63303 has an estimated population of 47,285 residents, with a density of 2,394 people per square mile.
What is the median household income in ZIP code 63303?
The median household income in ZIP code 63303 is $94,658, above the national median of ~$75,000.
What is the typical home value in ZIP code 63303?
The median home value in ZIP code 63303 is $283,100.
What timezone is ZIP code 63303 in?
ZIP code 63303 observes the CST timezone.