How many natural gas power plants are in Illinois?

Illinois has 73 operating utility-scale natural gas power plants with 19 GW of capacity, according to the EIA's monthly survey of power plants.

What is the largest natural gas power plant in Illinois?

Elwood Energy LLC in Will County, Illinois is the largest, at 1,728 MW. It came online in 2001.

How many natural gas power plants were built in Illinois in 2025?

0 natural gas power plants came online in Illinois in 2025, with 0 MW of capacity.

Who is developing natural gas power plants in Illinois?

Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

Natural gas power plants in Illinois

Illinois has 73 operating natural gas power plants with 19 GW of capacity.

Operating73

See planned natural gas power plants in Illinois

Updated monthly. Last updated November 2026.

Under 250 MW250–999 MW1 GW and up

Updated monthly. Last updated November 2026.

Illinois had 67 natural gas power plants online in 2016 and 73 in 2026

2016’162017’172018’182019’192020’202021’212022’222023’232024’242025’252026’26

Natural gas power plants online at the end of each year. Source: EIA-860M, compiled by Cleanview.

The 10 largest natural gas power plants in Illinois

Operating, by capacity

#	Natural gas power plant	County	Year online	Capacity
1	Elwood Energy LLC	Will County	2001	1,728 MW
2	CPV Three Rivers Energy Center	Grundy County	2023	1,300 MW
3	Jackson Generation, LLC	Will County	2022	1,289 MW
4	Kendall County Generation Facility	Kendall County	2002	1,256 MW
5	Aurora	DuPage County	2002	1,086 MW
6	University Park North	Will County	2002	726 MW
7	Holland Energy Facility	Shelby County	2002	702 MW
8	Lincoln Generating Facility	Will County	2000	692 MW
9	Lee Energy Facility	Lee County	2001	692 MW
10	Goose Creek Energy Center	Piatt County	2003	684 MW

Natural gas power plants that came online most recently in Illinois

Newest first

#	Natural gas power plant	County	Year online	Capacity
1	Waterloo	Monroe County	2026	22 MW
2	CPV Three Rivers Energy Center	Grundy County	2023	1,300 MW
3	Invenergy Nelson Expansion LLC	Lee County	2023	380 MW
4	Jackson Generation, LLC	Will County	2022	1,289 MW
5	Adkins Energy LLC	Stephenson County	2019	7 MW
6	TAC-Distributed Energy Resource Hybrid	Champaign County	2017	1 MW
7	Alsey	Scott County	2016	173 MW
8	Argonne National Laboratory CHP	DuPage County	2016	6 MW
9	Nelson Energy Center	Lee County	2015	628 MW
10	Triton East and West Cogen	Cook County	2015	4 MW

The developer behind each project is on paid plans. See plans

How Cleanview tracks natural gas power plants

Operating natural gas power plants come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about natural gas power plants in Illinois

How many natural gas power plants are in Illinois?: Illinois has 73 operating utility-scale natural gas power plants with 19 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest natural gas power plant in Illinois?: Elwood Energy LLC in Will County, Illinois is the largest, at 1,728 MW. It came online in 2001.
How many natural gas power plants were built in Illinois in 2025?: 0 natural gas power plants came online in Illinois in 2025, with 0 MW of capacity.
Who is developing natural gas power plants in Illinois?: Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.