| ZIP Codes: | 10 ZIP Codes (10 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 309 / 861 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:04 PM |
| Population: | 32,485 [See All] |
| FIPS: | 17203 |
| CBSA: | Peoria, IL |
| Land Area: | 471 sq mi |
| Water Area: | 4 sq mi |
| Coordinates: | 40.7655, -89.2009 |
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32,485 residents live across 10 ZIPs covering 471 sq mi, served by 10 distinct USPS-recognized cities.
Population moved from 33,602 to 32,485 from 2014 to 2024 — a -3.3% change. 4 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 61548 (Metamora, $128,559 median) and poorest ZIP 61530 (Eureka, $68,536) are 10.3 miles apart — a 1.9× income gap across local geography.
Median home values vary 2.7× across this county — from $118,100 in 61516 (Benson) to $317,900 in 61771 (Secor).
Density varies 13× across the county — from 19 people/sq mi in 61516 (Benson) to 254 in 61742 (Goodfield).
Educational attainment ranges from 18.6% bachelor's+ in 61516 (Benson) to 50.6% in 61548 (Metamora) — the breadth of educational profiles across the area.
Within Illinois, this is the #46 most populous of 102 counties and ranks #11 for median household income .
Weighted by population, the typical household earns about $99,405 across the county — reflecting what a typical resident sees, not a simple ZIP average.
37.3% of adults age 25+ hold a bachelor's degree or higher (8,171 of 21,917 reporting).
10 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 61548 | Metamora | Standard | 12,037 | $128,559 | 78.3 | -1.4% |
| 61530 | Eureka | Standard | 6,470 | $68,536 | 68.2 | -3.3% |
| 61738 | El Paso | Standard | 4,099 | $84,926 | 85.8 | -8.8% |
| 61561 | Roanoke | Standard | 2,393 | $86,071 | 55.2 | -13.7% |
| 61760 | Minonk | Standard | 2,226 | $75,362 | 66.3 | -10.9% |
| 61742 | Goodfield | Standard | 1,542 | $111,875 | 6.1 | 14.1% |
| 61729 | Congerville | Standard | 1,263 | $101,172 | 18.0 | 19.5% |
| 61771 | Secor | Standard | 1,106 | $101,600 | 25.1 | 2.4% |
| 61545 | Lowpoint | Standard | 722 | $72,692 | 35.0 | -15.6% |
| 61516 | Benson | Standard | 627 | $81,833 | 33.3 | 5.9% |