| ZIP Codes: | 7 ZIP Codes (6 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 618 / 730 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:04 PM |
| Population: | 16,172 [See All] |
| FIPS: | 17181 |
| Land Area: | 395 sq mi |
| Water Area: | 7 sq mi |
| Coordinates: | 37.4569, -89.2774 |
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16,172 residents live across 7 ZIPs covering 395 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 17,003 to 16,172 from 2014 to 2024 — a -4.9% change. 1 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 62926 (Dongola, $64,583 median) and poorest ZIP 62906 (Anna, $41,993) are 5.1 miles apart — a 1.5× income gap across local geography.
Median home values vary 1.4× across this county — from $108,300 in 62905 (Alto Pass) to $153,400 in 62920 (Cobden).
Density varies 27× across the county — from 4 people/sq mi in 62998 (Wolf Lake) to 116 in 62906 (Anna).
Educational attainment ranges from 13.5% bachelor's+ in 62926 (Dongola) to 36.6% in 62998 (Wolf Lake) — the breadth of educational profiles across the area.
Within Illinois, this is the #63 most populous of 102 counties and ranks #59 for median household income .
Weighted by population, the typical household earns about $52,082 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 (2,393 of 11,657 reporting).
6 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 |
|---|---|---|---|---|---|---|
| 62906 | Anna | Standard | 7,329 | $41,993 | 63.2 | 7.3% |
| 62920 | Cobden | Standard | 2,959 | $55,288 | 71.0 | -15.2% |
| 62952 | Jonesboro | Standard | 2,852 | $64,097 | 92.2 | -11.7% |
| 62926 | Dongola | Standard | 1,998 | $64,583 | 77.3 | -10.4% |
| 62905 | Alto Pass | Standard | 779 | $52,875 | 40.6 | -6.0% |
| 62998 | Wolf Lake | Standard | 218 | $56,300 | 50.5 | -36.3% |
| 62961 | Millcreek | PO Box | 37 | $151,250 | 0.0 | -22.9% |