Home / Solar by state / Illinois Solar installations in Illinois 74,860 recorded installations — prices, growth by year, county breakdown and the installers doing the work.
Dataset updated July 2026 . Sources: LBNL Tracking the Sun + city permit records + state programs + USGS/EIA utility-scale.
Median price
$2.21/W
pre-incentive
Third-party owned
39%
lease / PPA
Most active
Top installers in Illinois # Installer Installs in IL 1 HOLMES, WELLS L 832 2 LARSEN, COLEMAN D 427 3 ESKANDANIAN, PAYMON 386 4 WARD, JON P 376 5 AL HARASH, MOHAMED T 197 6 BROWN, JASON R 139 7 ADAMS, JAMES ADRIAN 132 8 HAJIHASHEMI, ALI 106 9 ZOMORODIAN, MEHDI 77 10 BASSAM, ASA 65 11 YURIANTO, YURIANTO 58 12 Solarcraft Services 49 13 Kapital Electric Company 49 14 MYKET, ALLAN T 40 15 ROGER ALWORTH 39
Illinois installer directory →
Growth
Installations by year Bars: recorded installs · right column: median $/W that year.
By county
Solar by county in Illinois County Installs Capacity Median $/W Cook County 25,528 740.8 MW $2.10/W Will County 5,156 222.1 MW — DuPage County 4,586 107.6 MW — Lake County 4,281 123.1 MW — Kane County 2,749 98.3 MW — McHenry County 2,499 197.4 MW — Winnebago County 2,485 164.7 MW $2.93/W Champaign County 1,556 130.7 MW — Kendall County 1,472 43.6 MW — Tazewell County 1,288 60.2 MW — Madison County 1,276 107.5 MW — Peoria County 1,133 74.7 MW — St. Clair County 1,118 105.5 MW — DeKalb County 809 176.6 MW — McLean County 799 37.4 MW — Stephenson County 742 161.6 MW — Boone County 734 43.3 MW — Sangamon County 722 27.9 MW — Ogle County 706 55.3 MW — Jo Daviess County 512 30.9 MW — Kankakee County 452 197.8 MW — Henry County 450 30.6 MW — Williamson County 413 62.0 MW — Woodford County 407 44.4 MW — Montgomery County 397 74.9 MW — Whiteside County 355 140.7 MW — Clinton County 339 37.3 MW — Macoupin County 335 34.8 MW — LaSalle County 333 92.7 MW — Jackson County 314 15.9 MW — Adams County 310 13.1 MW — Livingston County 302 127.3 MW — Knox County 280 60.3 MW — Fulton County 278 28.6 MW — Lee County 275 41.3 MW — Carroll County 264 8.7 MW — Hancock County 253 31.8 MW — Rock Island County 243 14.0 MW — Macon County 235 40.2 MW — Vermilion County 225 52.5 MW — Bond County 199 5.5 MW — Monroe County 197 5.3 MW — Grundy County 194 48.0 MW — Christian County 192 30.7 MW — Bureau County 183 65.0 MW — Effingham County 181 7.3 MW — Mercer County 181 18.8 MW — Morgan County 181 82.2 MW — Randolph County 177 21.4 MW — Piatt County 173 11.5 MW — Washington County 159 5.3 MW — Perry County 154 85.6 MW — Saline County 152 6.8 MW — Marion County 149 25.5 MW — McDonough County 146 36.7 MW — Logan County 140 119.1 MW — Fayette County 133 32.4 MW — Ford County 133 10.0 MW — Douglas County 127 28.7 MW — Jersey County 126 9.8 MW — Jefferson County 123 18.1 MW — Coles County 114 22.4 MW — Iroquois County 108 16.9 MW — Warren County 108 38.1 MW — Franklin County 107 11.8 MW — Edgar County 101 17.7 MW — Stark County 93 2.7 MW — Menard County 88 1.1 MW — Union County 81 1.8 MW — Shelby County 79 1.6 MW — Cass County 74 17.8 MW — Greene County 73 3.4 MW — Marshall County 72 23.1 MW — De Witt County 68 3.0 MW — Richland County 61 9.1 MW — Mason County 60 9.6 MW — Henderson County 58 5.4 MW — Pike County 55 6.2 MW — Lawrence County 46 15.1 MW — Clay County 42 18.4 MW — Crawford County 40 14.9 MW — Wabash County 39 693 kW — Cumberland County 38 16.3 MW — Jasper County 38 1.1 MW — Johnson County 34 3.4 MW — Scott County 33 412 kW — Brown County 30 333 kW — Clark County 30 850 kW — White County 30 3.0 MW — Moultrie County 29 674 kW — Pope County 29 437 kW — Gallatin County 26 3.8 MW — Wayne County 25 732 kW — Schuyler County 22 8.5 MW — Putnam County 21 12.3 MW — Hamilton County 20 510 kW — Calhoun County 14 166 kW — Hardin County 14 285 kW — Massac County 12 131 kW —
Counties derived from installation ZIP codes (Census ZCTA crosswalk) — approximate at boundaries. Counties with fewer than 50 recorded installs are shown but not indexed.
Frequently asked questions How many solar installations are there in Illinois? PanelCensus records 74,860 solar installations in Illinois, totalling 6.2 GW of capacity — compiled from LBNL's Tracking the Sun, city permit records, state programs and USGS/EIA utility-scale data. (Coverage depends on what the state publishes, so actual totals are higher.)
How much does solar cost per watt in Illinois? The median installed price across priced systems in Illinois is $2.21/W pre-incentive. Year-by-year medians are shown on this page.
Who are the biggest solar installers in Illinois? HOLMES, WELLS L has the most recorded installations in Illinois (832), followed by LARSEN, COLEMAN D (427).
© 2026 Hyder Media · PanelCensus — The public census of America's solar installations & installers. Built from public records: LBNL Tracking the Sun, city permits, state programs and USGS/EIA utility-scale data. Methodology & data