PlainZIP

Lake Forest, IL

Single-footprint Census roll-up for Lake Forest, IL: 1 USPS ZIP, population 20,925. 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 LAKE-FOREST-IL · Lake Forest, IL 1 ZIPs · 20,925 pop · #136/25278 · Lake County

INC-TOP · RANK-TOP · ABOVE-PEER · BOOK-ONE · OWN-HIGH · POP-TOWN · SPREAD-UNK · HOME-TOP

  • INC-TOP $233,125
  • RANK-TOP #136/25278
  • ABOVE-PEER over Barrington
  • BOOK-ONE 1 ZIP
  • OWN-HIGH 89% owners
  • POP-TOWN 20,925
  • SPREAD-UNK Single-ZIP book
  • HOME-TOP $923,500

Nearest income peer: Barrington, IL ( $55,559 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 Lake Forest

Lowest/highest poles plus county-sharing cities nearest Lake Forest 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, Lake Forest, IL sits among US cities with a top-decile household income, on a town-scale population base, across a single-ZIP footprint.

Top 1%
household income vs 25,278 US cities
20,925
city population (Census)
1
USPS ZIP codes covered
$233,125
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.

High-income footprint on only 1 ZIP: the city page and the ZIP page nearly coincide. Headline income $233,125 and home value $923,500 should be read as near-neighborhood numbers ; bachelor's attainment averages 81.2%.

Owner-occupancy here runs high (89.0%) - tenure is stable enough that the ZIP detail's owner share is the right next click, not a renter-heavy compare.

Within Illinois, Western Springs is the closest lower-income city and Golf the closest higher-income city by average ZIP household income. Their 1 and 1 ZIP footprints are the immediate statewide comparison set for Lake Forest.

Population concentration

One ZIP, 60045, is all of Lake Forest

There is no split to weigh here: 60045 holds every one of Lake Forest's 20,925 ACS residents. City-level and ZIP-level numbers on this site are the same number twice, check the ZIP page for the income/tenure/commute breakdown.

Census ZBP business roll-up

Dense ZBP book packed into Lake Forest's one ZIP

Citywide ZBP: 940 establishments, 24,318 employees , annual payroll $3,288,234k (~45 establishments per 1,000 residents) across 1 of 1 ZIPs. Peak business ZIP 60045 (940 units) ; leading NAICS Professional, scientific, and technical services (189) · also Health care and social assistance · Finance and insurance .

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ZIP Codes in Lake Forest, IL

These ZIP codes sit in Lake County, which covers 27 ZIP codes in all; 1 of them fall in Lake Forest. See the Lake County roll-up →

No other city sharing Lake County reports a higher average ZIP median income than Lake Forest. Waukegan, Round Lake and Barrington sit below it, so a household comparing this county on income alone starts here. Zion marks the far end of that range at $66,109, 72% below Lake Forest.

ZIP Code Population Median income Establishments Density
60045 20,925 $233,125 940 381
How we build city roll-ups · Guide: reading ZIP code data · BLS wages

Lake Forest 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 Lake Forest, .