PlainZIP

Flat Rock, IL

Single-footprint Census roll-up for Flat Rock, IL: 1 USPS ZIP, population 1,702. Open the primary ZIP for household income, housing tenure, and commute from ACS 2023 5-Year Estimates.

U.S. Census Bureau, SimpleMaps US ZIP Code Database, delivery-area ZIP coverage

ACS city ledger plate

Sheet FLAT-ROCK-IL · Flat Rock, IL 1 ZIPs · 1,702 pop · #8841/25278 · Crawford County

INC-HIGH · RANK-UPPER · BELOW-PEER · BOOK-ONE · OWN-HIGH · POP-VILLAGE · SPREAD-UNK · HOME-LOW

  • INC-HIGH $81,250
  • RANK-UPPER #8841/25278
  • BELOW-PEER under Annapolis
  • BOOK-ONE 1 ZIP
  • OWN-HIGH 94% owners
  • POP-VILLAGE 1,702
  • SPREAD-UNK Single-ZIP book
  • HOME-LOW $160,700

Nearest income peer: Annapolis, IL (+ $5,000 income $)

Instrument codes from this city’s ACS household income, national rank, county-peer gap, ZIP book, owner tenure, population scale, intra-city income spread, and home-value band, not a moving recommendation.

Income neighbourhood around Flat Rock

Lowest/highest poles plus county-sharing cities nearest Flat Rock on average ZIP median household income. Full ladder: /cities.

median HH income

What this shows County-sharing peers only, not the full US city board. Open a near peer when the gap is small; open the poles when the mosaic is wide.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2026-08-25

National city placement

According to ACS 5-Year Estimates, Flat Rock, IL sits among US cities with an above-median household income, on a village-scale population base, across a single-ZIP footprint.

Top 35%
household income vs 25,278 US cities
1,702
city population (Census)
1
USPS ZIP codes covered
$81,250
avg ZIP median income

Income percentile ranks this city's average ZIP median household income against 25,278 US cities with ACS income on at least one ZIP. Scale and ZIP-spread words come from Census population and USPS ZIP coverage.

Above-median income on a short ZIP list (1) - lead code 62427 (1,702 residents). Household income $81,250 is the roll-up; open the ZIP for tenure and commute.

Owner-occupancy here runs high (94.3%) - tenure is stable enough that the ZIP detail's owner share is the right next click, not a renter-heavy compare.

Within Illinois, Pawnee is the closest lower-income city and Varna the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Flat Rock.

Population concentration

Flat Rock's single ZIP 62427 carries the town

Flat Rock is published as a single USPS ZIP. Code 62427 is the entire residential footprint (1,702 ACS residents), so the city page and the ZIP page tell the same household story, open that ZIP for income, tenure, and commute detail.

Census ZBP business roll-up

Sparse ZBP book inside single-ZIP Flat Rock

Citywide ZBP: 21 establishments, 88 employees , annual payroll $3,560k (~12 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 62427 (21 units) ; leading NAICS Mining, quarrying, and oil and gas extraction (5) · also Other services (except public administration) · Manufacturing .

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ZIP Codes in Flat Rock, IL

These ZIP codes sit in Crawford County, which covers 7 ZIP codes in all; 1 of them fall in Flat Rock. See the Crawford County roll-up →

Flat Rock sits in the upper half of Crawford County on income: Robinson, Oblong and Palestine report less, while Annapolis and West York report more. Oblong marks the far end of that range at $59,555, 27% below Flat Rock.

ZIP Code Population Median income Establishments Density
62427 1,702 $81,250 21 7
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Flat Rock roll-ups here are for informational purposes only and do not constitute financial or relocation advice. ACS and Census ZBP figures are estimates; confirm the current table against Census before a money or move decision involving Flat Rock, .