34 ZIP Code Tabulation Areas in St. Clair County, Illinois. The population-weighted median household income is about $80,115, the median home value about $200,522, and 70.4% of occupied homes are owner-occupied.
- 34
- ZIP codes
- 339.6K
- Population
- 53
- Data points
St. Clair County at a glance
- $80,115
- Median household income
- $200,522
- Median home value
- 40
- Median age
- 70.4%
- Owner-occupied
- 153,247
- Housing units
Income, home value, and age are population-weighted averages of the ZIP-level medians in the file. Counts are exact.
Top 5 St. Clair County ZIP codes by median household income| # | ZIP | City | Population | Homeowner % | Median HH $ |
|---|
| 1 | 62285 | Smithton | 4,239 | 94.5% | $136,345 |
| 2 | 62294 | Troy | 15,325 | 79.1% | $120,466 |
| 3 | 62282 | St. Libory | 563 | 85.5% | $117,143 |
| 4 | 62236 | Columbia | 14,154 | 85.3% | $108,981 |
| 5 | 62269 | O'Fallon | 35,923 | 71.3% | $103,818 |
Top 5 St. Clair County ZIP codes by population| # | ZIP | City | Population | Homeowner % | Median HH $ |
|---|
| 1 | 62269 | O'Fallon | 35,923 | 71.3% | $103,818 |
| 2 | 62234 | Caseyville | 31,648 | 69.9% | $69,607 |
| 3 | 62221 | Belleville | 29,875 | 65.2% | $82,271 |
| 4 | 62226 | Belleville | 28,255 | 67% | $70,797 |
| 5 | 62220 | Belleville | 19,152 | 63% | $65,952 |
Top 5 St. Clair County ZIP codes by Homeowner GDP| # | ZIP | City | Population | Homeowner % | Median HH $ | Homeowner GDP |
|---|
| 1 | 62269 | O'Fallon | 35,923 | 71.3% | $103,818 | $1.1B |
| 2 | 62234 | Caseyville | 31,648 | 69.9% | $69,607 | $673.6M |
| 3 | 62221 | Belleville | 29,875 | 65.2% | $82,271 | $651.7M |
| 4 | 62298 | Floraville | 18,208 | 85.3% | $101,155 | $622.4M |
| 5 | 62226 | Belleville | 28,255 | 67% | $70,797 | $565.7M |
Homeowner GDP = owner-occupied units × median household income — a proxy for aggregate homeowner spending power in a ZIP, useful for scoring market opportunity. Not an official economic statistic.
Densest: 62226 (Belleville) at 2,036 people/sq mi. Least dense: 62257 (Marissa) at 26 people/sq mi.
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