St. Clair County, Missouri ZIP codes
6 ZIP codes are in St. Clair County, plus 10 that cross in from neighboring counties.
- ZIP codes
- 6
- Population in these ZIPs
- 8,861
- Avg. median income
- $50,300population-weighted
- Cities & towns
- 6
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ZIP codes in St. Clair County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 64724 | Appleton City | 1,999 | $49,338 | $173,400 |
| 64738 | Collins | 1,368 | $61,493 | $258,800 |
| 64763 | Lowry City | 1,676 | $54,821 | $147,100 |
| 64776 | Osceola | 3,374 | $44,880 | $206,700 |
| 64780 | Rockville | 364 | $44,107 | $213,900 |
| 64781 | Roscoe | 80 | $43,056 | — |
ZIP codes partly in St. Clair County
These ZIP codes are mostly in a neighboring county but cover part of St. Clair County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 64740 | Deepwater | Henry County | 1,469 | $61,641 | $216,200 |
| 64744 | El Dorado Springs | Cedar County | 8,242 | $47,685 | $197,200 |
| 64750 | Harwood | Vernon County | 439 | — | $219,000 |
| 64770 | Montrose | Henry County | 1,151 | $61,908 | $283,200 |
| 64783 | Schell City | Vernon County | 607 | $47,321 | $138,700 |
| 65355 | Warsaw | Benton County | 11,436 | $50,648 | $186,100 |
| 65674 | Humansville | Polk County | 2,896 | $47,500 | $233,000 |
| 65735 | Quincy | Hickory County | 212 | $72,724 | $560,900 |
| 65774 | Weaubleau | Hickory County | 855 | $31,674 | $178,300 |
| 65785 | Stockton | Cedar County | 6,002 | $50,086 | $252,500 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in St. Clair County
Nearby counties
Frequently asked questions
How many ZIP codes are in St. Clair County, Missouri?
6 ZIP codes are mainly in St. Clair County, and 10 more ZIP codes from neighboring areas reach partly into it.
What cities are in St. Clair County?
ZIP codes in St. Clair County use the city names Appleton City, Collins, Lowry City, Osceola, Rockville and Roscoe.