| ZIP Codes: | 11 ZIP Codes (7 Standard, 4 PO Box, 0 Unique) [See All] |
| Area Codes: | 618 / 730 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:04 PM |
| Population: | 63,233 [See All] |
| FIPS: | 17199 |
| CBSA: | Marion-Herrin, IL |
| Land Area: | 333 sq mi |
| Water Area: | 13 sq mi |
| Coordinates: | 37.7800, -88.9940 |
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63,233 residents live across 11 ZIPs covering 333 sq mi, served by 11 distinct USPS-recognized cities.
Population moved from 63,443 to 63,233 from 2014 to 2024 — a -0.3% change. 3 ZIPs gained residents, 8 lost.
The county's wealthiest ZIP 62922 (Creal Springs, $74,245 median) and poorest ZIP 62915 (Cambria, $31,875) are 20.7 miles apart — a 2.3× income gap across local geography.
Median home values vary 2.7× across this county — from $74,500 in 62949 (Hurst) to $200,200 in 62918 (Carterville).
Density varies 43× across the county — from 41 people/sq mi in 62922 (Creal Springs) to 1,742 in 62915 (Cambria).
Educational attainment ranges from 15.8% bachelor's+ in 62951 (Johnston City) to 40.2% in 62918 (Carterville) — the breadth of educational profiles across the area.
Within Illinois, this is the #23 most populous of 102 counties and ranks #95 for median household income .
Weighted by population, the typical household earns about $66,482 across the county — reflecting what a typical resident sees, not a simple ZIP average.
26.2% of adults age 25+ hold a bachelor's degree or higher (11,924 of 45,509 reporting).
7 Standard delivery, 4 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 62959 | Marion | Standard | 27,793 | $71,063 | 149.1 | 1.4% |
| 62948 | Herrin | Standard | 12,758 | $60,975 | 18.2 | -1.7% |
| 62918 | Carterville | Standard | 10,658 | $70,920 | 41.8 | 8.9% |
| 62951 | Johnston City | Standard | 5,342 | $50,657 | 29.3 | -3.3% |
| 62922 | Creal Springs | Standard | 2,608 | $74,245 | 64.0 | -19.5% |
| 62974 | Pittsburg | Standard | 1,536 | $64,107 | 26.0 | -0.6% |
| 62933 | Energy | Standard | 1,101 | $67,794 | 2.1 | -1.0% |
| 62949 | Hurst | PO Box | 702 | $37,308 | 1.6 | -12.5% |
| 62915 | Cambria | PO Box | 384 | $31,875 | 0.2 | 6.1% |
| 62921 | Colp | PO Box | 233 | — | 0.0 | -57.6% |
| 62841 | Freeman Spur | PO Box | 118 | $31,750 | 1.0 | -15.7% |