Lake St. Louis, MO ZIP Codes
One ZIP code serves Lake St. Louis, Missouri: 63367. Together they are home to 29,725 residents in 11,125 households. That is more than the 18,066 people counted inside Lake St. Louis city limits, because these ZIP codes reach past its boundary.
Lake St. Louis city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 18,066 |
| Households | 7,351 |
| Median household income | $125,693 |
| Median home value | $405,900 |
| Median age | 42.7 |
| Median rent | $1,588 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 29,725 |
| Households (sum of ZIP codes) | 11,125 |
| Median household income, range across ZIP codes | $137,648 (63367) to $137,648 (63367) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $137,648 |
| Homeowners | 81.5% |
| Households with kids under 18 | 36.5% |
| Moved in the past year | 13.2% |
| Carrier routes in EDDM2GO's route library | 20 routes, 12,642 homes (1 of 1 ZIP codes) |
Every ZIP code in Lake St. Louis
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 63367 | Lake Saint Louis | 29,725 | 11,125 | $137,648 | $409,100 | 81.5% | 36.5% | 13.2% | 20 | 13,150 | 65% of its land |
A ZIP code is listed for Lake St. Louis when at least 10% of its land lies inside Lake St. Louis city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Lake St. Louis. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Lake St. Louis.
Counties
- St. Charles County — 14 ZIP codes
Nearby cities sharing these ZIP codes
- O'Fallon — 3 ZIP codes
Price a mailing to Lake St. Louis ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Lake St. Louis, MO?
- 63367. A ZIP code is listed for Lake St.
- What is the population of Lake St. Louis, MO?
- The Census Bureau counts 18,066 residents inside Lake St. Louis city limits (ACS 2020–2024). The 1 ZIP code that serve Lake St. Louis hold 29,725 residents in all.
- What is the median household income in Lake St. Louis, MO?
- $125,693 inside Lake St. Louis city limits, per the Census Bureau. Across its ZIP codes the medians run from $137,648 to $137,648.
- How many carrier routes and mailboxes are in Lake St. Louis, MO?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 20 carrier routes reaching 12,642 residential and 508 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.