| ZIP Codes: | 8 ZIP Codes (7 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 217 / 447 / 618 / 730 / 779 / 815 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:11:59 PM |
| Population: | 19,096 [See All] |
| FIPS: | 17033 |
| CBSA: | Chicago-Naperville-Elgin, IL-IN |
| Land Area: | 497 sq mi |
| Water Area: | 6 sq mi |
| Coordinates: | 39.0418, -87.7620 |
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19,096 residents live across 8 ZIPs covering 497 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 19,972 to 19,015 from 2014 to 2024 — a -4.8% change. 2 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 62478 (West York, $98,750 median) and poorest ZIP 62449 (Oblong, $59,555) are 14.3 miles apart — a 1.7× income gap across local geography.
Median home values vary 2.3× across this county — from $89,600 in 62451 (Palestine) to $209,500 in 62413 (Annapolis).
Density varies 9× across the county — from 9 people/sq mi in 62413 (Annapolis) to 85 in 62454 (Robinson).
Educational attainment ranges from 7.0% bachelor's+ in 62413 (Annapolis) to 25.9% in 62454 (Robinson) — the breadth of educational profiles across the area.
Within Illinois, this is the #57 most populous of 102 counties and ranks #44 for median household income .
Weighted by population, the typical household earns about $72,256 across the county — reflecting what a typical resident sees, not a simple ZIP average.
20.5% of adults age 25+ hold a bachelor's degree or higher (2,842 of 13,896 reporting).
7 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 62454 | Robinson | Standard | 10,477 | $74,679 | 123.5 | -8.4% |
| 62449 | Oblong | Standard | 2,951 | $59,555 | 121.1 | -3.7% |
| 62451 | Palestine | Standard | 2,055 | $63,665 | 64.2 | -7.4% |
| 62427 | Flat Rock | Standard | 1,730 | $81,250 | 88.0 | 6.9% |
| 62433 | Hutsonville | Standard | 1,140 | $73,750 | 32.5 | 32.9% |
| 62478 | West York | Standard | 333 | $98,750 | 31.8 | -18.0% |
| 62413 | Annapolis | Standard | 329 | $86,250 | 35.7 | -11.3% |
| 62464 | Stoy | PO Box | 81 | $60,625 | 0.4 | — |