Home / Solar by state / Illinois Solar installations in Illinois 61,031 recorded installations — prices, growth by year, county breakdown and the installers doing the work.
Dataset updated July 2026 . Refreshed from LBNL's Tracking the Sun public releases.
Median price
$6.25/W
pre-incentive
Third-party owned
47%
lease / PPA
Most active
Top installers in Illinois 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 14,961 170.5 MW $7.80/W Will County 5,072 89.5 MW — DuPage County 4,462 58.5 MW — Lake County 4,179 63.0 MW — Kane County 2,693 39.2 MW — McHenry County 2,404 55.1 MW — Winnebago County 2,354 50.4 MW — Champaign County 1,471 41.2 MW — Kendall County 1,454 22.3 MW — Tazewell County 1,212 23.9 MW — Madison County 1,160 30.8 MW — Peoria County 1,055 25.4 MW — St. Clair County 1,024 30.8 MW — McLean County 756 14.6 MW — DeKalb County 714 33.4 MW — Boone County 710 13.0 MW — Sangamon County 688 13.1 MW — Stephenson County 670 36.7 MW — Ogle County 663 17.1 MW — Jo Daviess County 490 13.6 MW — Kankakee County 374 37.6 MW — Henry County 371 10.9 MW — Woodford County 370 7.2 MW — Montgomery County 369 6.6 MW — Williamson County 363 19.6 MW — Macoupin County 310 13.2 MW — Clinton County 293 8.7 MW — Jackson County 290 9.2 MW — LaSalle County 286 28.2 MW — Adams County 275 6.6 MW — Whiteside County 270 37.7 MW — Fulton County 251 8.2 MW — Carroll County 242 3.6 MW — Lee County 242 12.1 MW — Livingston County 233 6.7 MW — Hancock County 214 3.3 MW — Rock Island County 210 8.0 MW — Macon County 205 5.1 MW — Knox County 203 14.1 MW — Bond County 188 4.3 MW — Vermilion County 188 15.0 MW — Monroe County 185 3.3 MW — Christian County 173 4.8 MW — Grundy County 166 11.8 MW — Effingham County 160 2.9 MW — Bureau County 157 5.2 MW — Morgan County 156 15.6 MW — Piatt County 154 3.1 MW — Randolph County 152 3.3 MW — Perry County 139 2.8 MW — Mercer County 138 4.2 MW — Washington County 128 3.1 MW — McDonough County 122 11.3 MW — Fayette County 119 3.7 MW — Saline County 119 3.8 MW — Ford County 118 2.6 MW — Logan County 117 6.3 MW — Marion County 116 6.1 MW — Douglas County 115 13.7 MW — Jersey County 113 4.6 MW — Jefferson County 102 4.9 MW — Franklin County 98 4.8 MW — Coles County 94 3.5 MW — Iroquois County 92 4.9 MW — Edgar County 88 2.2 MW — Menard County 86 939 kW — Warren County 86 2.1 MW — Union County 77 954 kW — Shelby County 76 890 kW — Stark County 73 1.6 MW — Cass County 65 3.5 MW — Greene County 65 2.2 MW — De Witt County 59 1.9 MW — Marshall County 57 4.2 MW — Richland County 52 3.5 MW — Mason County 51 3.6 MW — Pike County 50 4.0 MW — Henderson County 46 3.0 MW — Clay County 37 3.1 MW — Jasper County 35 467 kW — Lawrence County 35 908 kW — Wabash County 35 525 kW — Crawford County 34 652 kW — Johnson County 32 374 kW — Cumberland County 31 338 kW — Scott County 31 362 kW — Brown County 30 333 kW — Pope County 28 407 kW — Clark County 27 439 kW — Moultrie County 25 402 kW — White County 23 494 kW — Gallatin County 21 672 kW — Wayne County 21 323 kW — Schuyler County 19 187 kW — Hamilton County 17 360 kW — Putnam County 16 2.7 MW — Calhoun County 14 166 kW — Hardin County 12 235 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? LBNL's Tracking the Sun dataset records 61,031 residential and small-commercial solar installations in Illinois, totalling 1.3 GW of capacity. (Coverage depends on the state's reporting programs, so actual totals are higher.)
How much does solar cost per watt in Illinois? The median installed price across priced systems in Illinois is $6.25/W pre-incentive. Year-by-year medians are shown on this page.
Who are the biggest solar installers in Illinois? Solarcraft Services has the most recorded installations in Illinois (49), followed by Kapital Electric Company (39).
© 2026 Hyder Media · PanelCensus — The public census of America's solar installations & installers. Built from LBNL's public Tracking the Sun research dataset. Methodology & data