St. Charles, MO ZIP Codes
2 ZIP codes serve St. Charles, Missouri: 63301 and 63303. Together they are home to 98,756 residents in 42,152 households. That is more than the 71,508 people counted inside St. Charles city limits, because these ZIP codes reach past its boundary. Median household income ranges from $85,308 in 63301 to $99,138 in 63303.
St. Charles city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 71,508 |
| Households | 30,362 |
| Median household income | $85,937 |
| Median home value | $298,700 |
| Median age | 38.6 |
| Median rent | $1,251 |
All 2 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 98,756 |
| Households (sum of ZIP codes) | 42,152 |
| Median household income, range across ZIP codes | $85,308 (63301) to $99,138 (63303) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $92,096 |
| Homeowners | 72.9% |
| Households with kids under 18 | 24.6% |
| Moved in the past year | 13.4% |
| Carrier routes in EDDM2GO's route library | 72 routes, 44,483 homes (2 of 2 ZIP codes) |
Top facts
- Highest median household income in St. Charles: 63303 ($99,138)
- Most residents: 63301 (52,667 people)
- Highest homeownership: 63303 (74.1% own their home)
- Most households with kids: 63301 (26.3% of households)
- Most new movers: 63303 (13.6% moved in last year)
- Youngest median age: 63301 (38.0 years)
- Highest median home value: 63303 ($321,100)
Every ZIP code in St. Charles
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 63301 | Saint Charles | 52,667 | 21,462 | $85,308 | $267,600 | 71.8% | 26.3% | 13.3% | 39 | 25,051 | 21% of its land |
| 63303 | Saint Charles | 46,089 | 20,690 | $99,138 | $321,100 | 74.1% | 22.9% | 13.6% | 33 | 22,024 | 37% of its land |
A ZIP code is listed for St. Charles when at least 10% of its land lies inside St. Charles city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is St. Charles. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside St. Charles.
Counties
- St. Charles County — 14 ZIP codes
Price a mailing to St. Charles ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in St. Charles, MO?
- 63301 and 63303. A ZIP code is listed for St.
- What is the population of St. Charles, MO?
- The Census Bureau counts 71,508 residents inside St. Charles city limits (ACS 2020–2024). The 2 ZIP codes that serve St. Charles hold 98,756 residents in all.
- What is the median household income in St. Charles, MO?
- $85,937 inside St. Charles city limits, per the Census Bureau. Across its ZIP codes the medians run from $85,308 to $99,138.
- Which St. Charles ZIP code has the highest median household income?
- 63303, at $99,138, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in St. Charles, MO?
- For the 2 of 2 ZIP codes in EDDM2GO's stored route library: 72 carrier routes reaching 44,483 residential and 2,581 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.