| ZIP Codes: | 13 ZIP Codes (10 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Codes: | 618 / 730 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:11:59 PM |
| Population: | 33,329 [See All] |
| FIPS: | 17027 |
| CBSA: | St. Louis, MO-IL |
| Land Area: | 492 sq mi |
| Water Area: | 31 sq mi |
| Coordinates: | 38.5844, -89.4923 |
| Quick Link: |
33,329 residents live across 13 ZIPs covering 492 sq mi, served by 13 distinct USPS-recognized cities.
Population moved from 33,334 to 33,329 from 2014 to 2024 — a 0.0% change. 9 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 62216 (Aviston, $120,139 median) and poorest ZIP 62253 (Keyesport, $47,000) are 19.1 miles apart — a 2.6× income gap across local geography.
Median home values vary 2.7× across this county — from $95,500 in 62253 (Keyesport) to $260,900 in 62216 (Aviston).
Density varies 61× across the county — from 26 people/sq mi in 62253 (Keyesport) to 1,559 in 62219 (Beckemeyer).
Educational attainment ranges from 7.0% bachelor's+ in 62253 (Keyesport) to 38.1% in 62216 (Aviston) — the breadth of educational profiles across the area.
Within Illinois, this is the #42 most populous of 102 counties and ranks #19 for median household income .
Weighted by population, the typical household earns about $91,052 across the county — reflecting what a typical resident sees, not a simple ZIP average.
28.2% of adults age 25+ hold a bachelor's degree or higher (6,578 of 23,307 reporting).
10 Standard delivery, 3 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 62231 | Carlyle | Standard | 6,377 | $84,214 | 210.5 | -13.3% |
| 62230 | Breese | Standard | 6,377 | $91,350 | 49.9 | 2.0% |
| 62265 | New Baden | Standard | 4,555 | $84,853 | 37.8 | 0.5% |
| 62293 | Trenton | Standard | 4,433 | $98,155 | 54.0 | -5.2% |
| 62216 | Aviston | Standard | 3,156 | $120,139 | 22.9 | 10.9% |
| 62218 | Bartelso | Standard | 2,018 | $91,250 | 45.2 | 14.1% |
| 62215 | Albers | Standard | 1,917 | $107,727 | 11.5 | 8.7% |
| 62245 | Germantown | Standard | 1,861 | $91,767 | 21.1 | 19.6% |
| 62219 | Beckemeyer | PO Box | 993 | $63,603 | 0.6 | 3.8% |
| 62253 | Keyesport | Standard | 932 | $47,000 | 36.5 | 26.5% |
| 62250 | Hoffman | Standard | 607 | $66,667 | 0.5 | 10.2% |
| 62266 | New Memphis | PO Box | 103 | $52,917 | 1.1 | -69.2% |
| 62252 | Huey | PO Box | — | — | 0.0 | — |