Solar installations in LaSalle County, IL
728 recorded installations in LaSalle County, Illinois — capacity, prices and the installers doing the work.
At a glance
LaSalle County, Illinois has 728 recorded solar installations totalling 103.9 MW of capacity — the 24th-highest count among the 102 Illinois counties with records, and under 1% of the state total. That is about 1.5% of the county's 49,838 housing units, against 2.1% statewide.
Dataset updated . Sources: LBNL Tracking the Sun + city permit records + state programs + USGS/EIA utility-scale.
Search every recorded installation in LaSalle County by installer, size, date and equipment.
Search sites →Independent check:Stanford's DeepSolar detected about 74 solar arrays here from 2018 satellite imagery — our recorded data covers roughly 984% of that. A yardstick, not dated records.
Most active
Top installers in LaSalle County
No resolved installers recorded in this county.
Growth
Installations by year
How does LaSalle County compare with the rest of Illinois?
The median recorded system in LaSalle County is 10.79 kW, about 20% above the state median of 8.97 kW. 43% of installations here are third-party owned (lease or power-purchase agreement), compared with 43% across Illinois. 34 systems (5%) of the county's records include battery storage, against 4% statewide. By share of housing units with a recorded system, LaSalle County ranks 74th of 102 Illinois counties with at least 10 installations. Fewer than 30 systems here report an installed price, so no county price median is published.
How has solar adoption changed in LaSalle County?
The earliest recorded installation in LaSalle County dates to 2016. The busiest year on record is 2024, with 259 installations. 2025 has 191 recorded installations so far. The county's cumulative total rose from 50 at the end of 2020 to 728 today. Recent years fill in as state programs and permit offices report, so the latest counts are provisional.
Frequently asked questions
How many homes have solar in LaSalle County?
PanelCensus records 728 solar installations in LaSalle County, Illinois (103.9 MW of capacity) — about 1.5% of the county's 49,838 housing units (U.S. Census ACS). Coverage depends on Illinois's public reporting, so the true total is likely higher.
How much of the solar in LaSalle County is leased?
310 recorded installations (43%) in LaSalle County are third-party owned — a lease or power-purchase agreement, compared with 43% across Illinois.
How big is a typical solar system in LaSalle County?
The median recorded system in LaSalle County is 10.8 kW, against 9 kW for Illinois as a whole.
More solar data near LaSalle County
- Solar in Illinois· 115,105 installations
- Solar installers in Illinois
- Solar in Jo Daviess County· 780 installations
- Solar in Woodford County· 766 installations
- Solar in Williamson County· 746 installations
- Solar in Adams County· 685 installations
- Solar in Whiteside County· 672 installations
- Solar in Henry County· 638 installations
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.
About this data
Source: Lawrence Berkeley National Laboratory's Tracking the Sun, merged with city permit records, state incentive programs and the USGS U.S. Large-Scale Solar Photovoltaic Database / EIA-860 plant registers, as published October 10, 2026 — PanelCensus refreshes it as each source publishes new records. See the methodology for how records are matched, cleaned and scored.
Cite as: PanelCensus, “Solar installations in LaSalle County, Illinois”, https://panelcensus.com/solar/illinois/lasalle-county (data as of October 10, 2026).