Solar installations in Williamson County, IL
746 recorded installations in Williamson County, Illinois — capacity, prices and the installers doing the work.
Dataset updated . Sources: LBNL Tracking the Sun + city permit records + state programs + USGS/EIA utility-scale.
Severe-weather exposure: solar sites here have been matched to an average of 3.5 hail (2 severe) and 2.8 high-wind NOAA storm events — a regional inspection/maintenance signal (proximity, not confirmed damage).
Search every recorded installation in Williamson County by installer, size, date and equipment.
Search sites →Independent check:Stanford's DeepSolar detected about 194 solar arrays here from 2018 satellite imagery — our recorded data covers roughly 385% of that. A yardstick, not dated records.
Most active
Top installers in Williamson County
No resolved installers recorded in this county.
Growth
Installations by year
Frequently asked questions
How many homes have solar in Williamson County?
PanelCensus records 746 solar installations in Williamson County, Illinois (70.1 MW of capacity) — about 2.3% of the county's 31,957 housing units (U.S. Census ACS). Dataset coverage depends on Illinois's reporting programs, so the true total is higher.
How much does solar cost in Williamson County?
Not enough priced records in this county to compute a reliable median.
Who installs solar in Williamson County?
No resolved installers recorded in this county.
County assignment is derived from installation ZIP codes via the Census 2020 ZCTA↔county crosswalk (primary county by land-area overlap) — approximate at county boundaries. Market penetration = recorded installations ÷ housing units (U.S. Census Bureau ACS 5-Year, Table B25001); it undercounts where dataset coverage is partial. See methodology.