| ZIP Codes: | 6 ZIP Codes (6 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 217 / 447 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:02 PM |
| Population: | 12,203 [See All] |
| FIPS: | 17129 |
| CBSA: | Springfield, IL |
| Land Area: | 328 sq mi |
| Water Area: | 1 sq mi |
| Coordinates: | 40.0321, -89.8343 |
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12,203 residents live across 6 ZIPs covering 328 sq mi, served by 6 distinct USPS-recognized cities.
Population moved from 12,766 to 12,203 from 2014 to 2024 — a -4.4% change. 2 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 62613 (Athens, $86,675 median) and poorest ZIP 62673 (Oakford, $68,393) are 16.8 miles apart — a 1.3× income gap across local geography.
Median home values vary 1.8× across this county — from $112,700 in 62642 (Greenview) to $204,000 in 62675 (Petersburg).
Density varies 4× across the county — from 13 people/sq mi in 62673 (Oakford) to 53 in 62613 (Athens).
Educational attainment ranges from 11.1% bachelor's+ in 62673 (Oakford) to 33.6% in 62613 (Athens) — the breadth of educational profiles across the area.
Within Illinois, this is the #84 most populous of 102 counties and ranks #31 for median household income .
Weighted by population, the typical household earns about $83,163 across the county — reflecting what a typical resident sees, not a simple ZIP average.
28.5% of adults age 25+ hold a bachelor's degree or higher (2,471 of 8,661 reporting).
6 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 |
|---|---|---|---|---|---|---|
| 62675 | Petersburg | Standard | 6,170 | $84,267 | 117.4 | 0.9% |
| 62613 | Athens | Standard | 3,598 | $86,675 | 67.6 | -2.6% |
| 62642 | Greenview | Standard | 1,396 | $77,538 | 70.3 | -13.0% |
| 62688 | Tallula | Standard | 678 | $73,929 | 44.7 | 11.1% |
| 62673 | Oakford | Standard | 361 | $68,393 | 27.8 | -51.5% |
| 62659 | Lincolns New Salem | Standard | — | — | 0.0 | — |