Flat Rock Illinois ZIP Codes
Flat Rock holds a single ZIP code.
Every ZIP code in Flat Rock
| ZIP code | County |
|---|---|
| 62427 | Crawford 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Flat Rock codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Flat Rock. 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 Flat Rock ZIP code begins 624. Those first three digits identify the sectional center facility that processes mail for this part of Illinois. Statewide that range covers 61 ZIP codes, so Flat Rock accounts for 2% of it.
Every Illinois ZIP prefix and the region it covers →
Area codes covering Flat Rock
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 Flat Rock occupies.
Flat Rock Illinois area codes in full →
Where Flat Rock's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Flat Rock
| City | Distance | ZIP codes |
|---|---|---|
| Palestine Illinois ZIP codes | 7.5 mi | 1 ZIP code |
| Robinson Illinois ZIP codes | 7.9 mi | 1 ZIP code |
| Stoy Illinois ZIP codes | 11 mi | 1 ZIP code |
| Lawrenceville Illinois ZIP codes | 12 mi | 1 ZIP code |
| Bridgeport Illinois ZIP codes | 14 mi | 1 ZIP code |
| Hutsonville Illinois ZIP codes | 14 mi | 1 ZIP code |
| Oblong Illinois ZIP codes | 14 mi | 1 ZIP code |
| Sumner Illinois ZIP codes | 17 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.