Illinois

OKLocate measures 3,690,768 homes across 102 of Illinois's 102 counties. FEMA flood share and census tract counts are published for all of them.

Address level data

  • Forward geocoding · Every county
  • Reverse geocoding · Every county
  • Typeahead · About 100 ms
  • County FIPS on every result
  • Census tract on every result (Q4 2026)
  • Place on every result (Q4 2026)
  • School district on every result (Q4 2026)
  • Legislative districts on every result (Q4 2026)

Mapping

  • Base map · Every county
  • Aerial imagery · To zoom 18, 30 cm
  • High-resolution aerial, zoom 16 to 18 · 30 cm
  • Flood zone boundaries · FEMA NFHL
  • School district boundaries
  • Place boundaries
  • ZIP code boundaries
  • Census tract boundaries
  • Legislative boundaries (Q4 2026)

Property measurements

  • Measured property profiles · Up to 92 fields per home
  • Roof, solar and pool measurements · 99 of 102 counties
  • Viewable LiDAR point cloud per home
  • Search a county on any measured field

Demographics

  • Population and households · Every county
  • Housing units, owner and renter
  • Median home value and rent
  • Median household income
  • Year built and unit types
  • FEMA flood share and zone breakdown

Illinois by the numbers

Homes measured
3,690,768
Counties
102
Counties measured
102 of 102
Census tracts
3,265
CountyHomes measuredFieldsLand in a flood zoneCensus tracts
Cook County924,276924.9%1,332
DuPage County242,925918.4%219
Lake County217,782916.6%160
Will County208,0097812.8%172
Kane County142,9769110.3%104
Madison County100,986140.0%63
McHenry County98,6879111.7%64
Winnebago County84,2437814.0%80
St. Clair County79,645770.0%68
Sangamon County66,039919.9%54
Peoria County57,880910.1%49
McLean County57,038924.1%47
Champaign County53,131787.0%48
Macon County48,512787.0%37
Rock Island County48,3727720.8%43
LaSalle County47,773924.2%28
Tazewell County47,1859111.0%30
Kendall County44,966146.1%21
Vermilion County40,767784.2%24
Kankakee County40,529927.1%30
Williamson County34,9787812.7%18
Henry County33,323788.4%14
DeKalb County33,152784.9%23
Knox County31,172924.9%16
Whiteside County26,9787821.7%19
Franklin County24,8267822.3%12
Adams County23,8869212.6%19
Jackson County23,3747828.0%17
Clinton County22,6567832.5%9
Macoupin County22,121920.0%13
Grundy County22,0697810.9%10
Coles County21,796924.8%13
Lee County21,6707813.8%9
Ogle County21,609785.3%13
Boone County21,519928.6%10
Iroquois County20,037925.1%9
Livingston County19,727927.4%10
Stephenson County19,609788.9%13
Effingham County19,092787.0%8
Montgomery County18,981920.0%8
Shelby County17,932780.0%6
Woodford County17,905926.9%9
Marion County17,538784.9%12
Christian County17,472926.3%10
Fulton County17,3379212.9%12
Monroe County16,4747833.3%7
Bureau County15,7759210.0%10
Morgan County14,7199210.1%10
Logan County14,6631415.1%8
Fayette County14,419780.0%7
Randolph County12,7727824.6%10
Jefferson County12,3647812.8%11
Carroll County12,2827812.7%6
Crawford County12,0849215.0%6
Washington County11,993780.0%4
Saline County11,4747830.4%9
Jersey County11,4657811.9%6
Pike County11,0959213.5%5
Richland County11,087780.0%5
Wayne County10,837780.0%5
Clark County10,826928.9%4
Douglas County10,145927.4%5
Ford County10,020929.5%5
Hancock County9,9839212.4%7
Perry County9,8137811.2%6
Bond County9,795780.0%4
Mason County9,5499218.3%6
McDonough County9,509920.0%11
Piatt County9,480926.0%4
White County9,2267840.1%5
De Witt County8,980927.2%5
Edgar County8,964923.2%5
Jasper County8,932920.0%3
Moultrie County8,585788.0%4
Johnson County8,568780.0%4
Mercer County8,5169213.4%4
Jo Daviess County8,315787.9%7
Massac County8,0667810.5%4
Cumberland County7,844927.8%3
Marshall County7,812928.4%5
Warren County7,612925.9%5
Union County6,8737826.1%5
Greene County6,7269220.1%5
Cass County6,2139222.3%5
Menard County6,0229214.6%3
Wabash County5,9037826.4%4
Henderson County5,5569219.1%3
Stark County5,444927.8%2
Edwards County4,985780.0%3
Gallatin County4,1097846.5%2
Putnam County4,0579218.6%2
Schuyler County3,8579210.9%3
Alexander County3,6547856.0%4
Brown County3,602925.9%2
Hamilton County3,527780.0%3
Lawrence County3,4099236.2%5
Pope County3,137780.0%2
Calhoun County2,0557828.1%2
Hardin County1,5377810.7%2
Pulaski County1,353780.1%2
Clay County1,3137814.0%4
Scott County9139229.9%2

Flood share is the percent of a county's land inside a FEMA Special Flood Hazard Area, from the National Flood Hazard Layer. It is a map overlay for analysis, not a flood determination. A blank cell means we have no measurement for that county, which is not the same as zero.