Eureka Illinois ZIP Codes
Eureka holds a single ZIP code.
Every ZIP code in Eureka
| ZIP code | County |
|---|---|
| 61530 | Woodford County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Eureka codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Eureka. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Eureka ZIP code begins 615. Those first three digits identify the sectional center facility that processes mail for this part of Illinois. Statewide that range covers 48 ZIP codes, so Eureka accounts for 2% of it.
Every Illinois ZIP prefix and the region it covers →
Area codes covering Eureka
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Eureka occupies.
Eureka Illinois area codes in full →
Where Eureka's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Eureka
| City | Distance | ZIP codes |
|---|---|---|
| Goodfield Illinois ZIP codes | 5.9 mi | 1 ZIP code |
| Deer Creek Illinois ZIP codes | 6.5 mi | 1 ZIP code |
| Roanoke Illinois ZIP codes | 7.1 mi | 1 ZIP code |
| Metamora Illinois ZIP codes | 7.4 mi | 1 ZIP code |
| Secor Illinois ZIP codes | 7.7 mi | 1 ZIP code |
| Congerville Illinois ZIP codes | 7.7 mi | 1 ZIP code |
| Washington Illinois ZIP codes | 8.2 mi | 1 ZIP code |
| Carlock Illinois ZIP codes | 12 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.