St. Charles County, MO ZIP Codes
14 ZIP codes cover all or part of St. Charles County, Missouri. The Census Bureau counts 414,535 residents in the county, with a median household income of $104,692 and a median home value of $320,800. Median household income ranges from $85,308 in 63301 to $170,598 in 63341. Its largest communities include O'Fallon, St. Charles, St. Peters, Wentzville and Lake St. Louis.
St. Charles County (Census county figures)
| Measure | Census figure |
|---|---|
| Residents | 414,535 |
| Households | 161,311 |
| Median household income | $104,692 |
| Median home value | $320,800 |
| Median age | 39.8 |
| Median rent | $1,370 |
All 14 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 416,486 |
| Households (sum of ZIP codes) | 162,098 |
| Median household income, range across ZIP codes | $85,308 (63301) to $170,598 (63341) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $106,478 |
| Homeowners | 80.6% |
| Households with kids under 18 | 32.0% |
| Moved in the past year | 10.4% |
| Carrier routes in EDDM2GO's route library | 275 routes, 174,415 homes (13 of 14 ZIP codes) |
Top facts
- Highest median household income in St. Charles County: 63341 ($170,598)
- Most residents: 63376 (74,962 people)
- Highest homeownership: 63332 (96.8% own their home)
- Most households with kids: 63385 (40.8% of households)
- Most new movers: 63303 (13.6% moved in last year)
- Youngest median age: 63301 (38.0 years)
- Highest median home value: 63341 ($606,800)
Every ZIP code in St. Charles County
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 63376 | Saint Peters | 74,962 | 30,034 | $96,393 | $275,400 | 81.3% | 29.4% | 8.4% | 48 | 33,562 | 100% of its land |
| 63366 | O Fallon | 54,769 | 20,967 | $100,621 | $304,500 | 82.1% | 33.0% | 8.8% | 33 | 22,640 | 100% of its land |
| 63301 | Saint Charles | 52,667 | 21,462 | $85,308 | $267,600 | 71.8% | 26.3% | 13.3% | 39 | 25,051 | 100% of its land |
| 63385 | Wentzville | 51,330 | 18,106 | $112,199 | $347,200 | 83.9% | 40.8% | 9.9% | 32 | 22,766 | 100% of its land |
| 63368 | O Fallon | 46,966 | 17,271 | $124,297 | $349,200 | 82.0% | 38.4% | 10.5% | 28 | 19,124 | 100% of its land |
| 63303 | Saint Charles | 46,089 | 20,690 | $99,138 | $321,100 | 74.1% | 22.9% | 13.6% | 33 | 22,024 | 100% of its land |
| 63304 | Saint Charles | 43,195 | 16,284 | $114,442 | $351,000 | 87.7% | 33.8% | 8.1% | 29 | 18,934 | 100% of its land |
| 63367 | Lake Saint Louis | 29,725 | 11,125 | $137,648 | $409,100 | 81.5% | 36.5% | 13.2% | 20 | 13,150 | 100% of its land |
| 63348 | Foristell | 10,394 | 3,781 | $115,661 | $386,200 | 89.1% | 35.7% | 11.0% | 6 | 3,314 | 78% of its land |
| 63341 | Defiance | 3,515 | 1,324 | $170,598 | $606,800 | 95.5% | 35.3% | 5.5% | 3 | 1,593 | 100% of its land |
| 63332 | Augusta | 1,651 | 616 | $146,146 | $385,400 | 96.8% | 33.1% | 1.5% | 2 | 647 | 100% of its land |
| 63373 | Portage Des Sioux | 690 | 260 | $88,750 | $221,300 | 85.8% | 28.8% | 7.8% | 1 | 314 | 100% of its land |
| 63386 | West Alton | 482 | 159 | $110,250 | $157,000 | 86.2% | 40.3% | 20.5% | 1 | 233 | 100% of its land |
| 63365 | New Melle | 51 | 19 | $53,542 | — | 84.2% | 26.3% | 0.0% | — | — | 100% of its land |
A ZIP code is listed for St. Charles County when at least 10% of its land is in the county, when it holds at least 10% of the county's land, or when the county is its main county. Totals add up whole ZIP codes, including parts that cross the county line; the Census county figures above do not.
Cities and communities
- O'Fallon — 93,801 residents · 3 ZIP codes
- St. Charles — 71,508 residents · 2 ZIP codes
- St. Peters — 59,092 residents · 2 ZIP codes
- Wentzville — 47,061 residents · 1 ZIP code
- Lake St. Louis — 18,066 residents · 1 ZIP code
- Dardenne Prairie — 13,503 residents · 1 ZIP code
- Cottleville — 5,937 residents · 2 ZIP codes
- Weldon Spring — 5,310 residents · 1 ZIP code
- St. Paul — 3,456 residents · 1 ZIP code
- Foristell — 1,096 residents · 1 ZIP code
- Josephville — 664 residents · 1 ZIP code
- Flint Hill — 583 residents · 2 ZIP codes
- West Alton — 467 residents · 1 ZIP code
- New Melle — 452 residents · 2 ZIP codes
- Portage Des Sioux — 340 residents · 1 ZIP code
- Augusta — 285 residents · 1 ZIP code
- Weldon Spring Heights — 121 residents · 1 ZIP code
- Defiance — 63 residents · 1 ZIP code
Rankings
- Richest ZIP codes in St. Charles County — 11 ZIP codes ranked
- ZIP codes with the highest home values in St. Charles County — 11 ZIP codes ranked
- ZIP codes with the highest homeownership in St. Charles County — 11 ZIP codes ranked
- ZIP codes with the most families with kids in St. Charles County — 11 ZIP codes ranked
- ZIP codes with the most new movers in St. Charles County — 11 ZIP codes ranked
- Youngest ZIP codes in St. Charles County — 11 ZIP codes ranked
- Oldest ZIP codes in St. Charles County — 11 ZIP codes ranked
- Fastest-growing ZIP codes in St. Charles County — 11 ZIP codes ranked
Price a mailing to St. Charles County ZIP codes
EDDM guides
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Frequently asked questions
- What ZIP codes are in St. Charles County, MO?
- 63376, 63366, 63301, 63385, 63368, 63303, 63304, 63367, 63348, 63341, 63332, 63373, 63386 and 63365. Some cross the county line; the table shows each ZIP's share of land in the county.
- What is the population of St. Charles County?
- 414,535 residents in 161,311 households (ACS 5-year estimates, 2020–2024).
- What is the median household income in St. Charles County?
- $104,692 for the county as a whole. Its ZIP codes range from $85,308 (63301) to $170,598 (63341).
- Which St. Charles County ZIP code has the highest median household income?
- 63341, at $170,598, among ZIP codes with at least 1,000 residents. See the full ranking of St. Charles County ZIP codes by income.
- How many carrier routes and mailboxes are in St. Charles County?
- For the 13 of 14 ZIP codes in EDDM2GO's stored route library: 275 carrier routes reaching 174,415 residential and 8,914 business mailboxes. The route map loads the rest when you search them.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.