Census place · GEOID 1726350 · Crawford County
Flat Rock, IL ZIP codes
1 ZIP/ZCTA intersecting this Census place in Crawford County.
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: Census place Flat Rock (GEOID 1726350). Methodology
Combined population of ZIP/ZCTAs intersecting this place: 1,905 (1 ZIPs).
Combined population of ZIP/ZCTAs intersecting this place. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census place ACS headline above. Methodology
Map of Flat Rock, IL

ZIP/ZCTA overlap with Flat Rock
Population overlap
Share of each ZIP/ZCTA’s population located within Flat Rock, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
- 6242720.4%
USPS primary city
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
ZIP codes intersecting Flat Rock
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 62427 | Flat Rock | Crawford County | 1,905 | $74,167 |