How many natural gas power plants are planned in Illinois?

Developers have proposed 11 natural gas power plants in Illinois with 5.2 GW of capacity, according to the grid operators' interconnection queues. Most queue projects are never built.

What is the largest planned natural gas power plant in Illinois?

Jackson Generation in Will County, Illinois is the largest planned, at 1,261 MW. It is expected to come online in 2027.

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.

Planned natural gas power plants in Illinois

Developers have proposed 11 natural gas power plants in Illinois with 5.2 GW of capacity, in the grid operators' interconnection queues.

Planned11

See operating 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.

More planned natural gas power plants in Illinois are expected online in 2027 than in any other year

2026’262027’272028’282029’292030’302031’312032’322033’33

Planned natural gas power plants by the year they're expected online. Source: the grid operators' interconnection queues, compiled by Cleanview.

The 10 largest planned natural gas power plants in Illinois

Planned, by capacity

#	Natural gas power plant	County	Expected online	Capacity
1	Jackson Generation	Will County	2027	1,261 MW
2	Austin Substation 345kV Bus	Sangamon County	2025	1,165 MW
3	Lincoln Land Energy Center	Sangamon County	2030	638 MW
4	Lincoln Land Energy Center	Sangamon County	2030	638 MW
5	Nelson 345 kV	Lee County	2028	391 MW
6	Nelson 345 kV	Lee County	–	391 MW
7	Decatur ADM North 138 kV	Macon County	2026	340 MW
8	University Park 138 kV	Will County	2025	328 MW
9	Gibson City South Substation	Ford County	2017	57 MW
10	ITT Cogen Facility	Cook County	2027	4 MW

Planned natural gas power plants expected online soonest in Illinois

In the next 18 months, soonest first

#	Natural gas power plant	County	Expected online	Capacity
1	Jackson Generation	Will County	2027	1,261 MW
2	ITT Cogen Facility	Cook County	2027	4 MW
3	ITT Cogen Facility	Cook County	2027	4 MW
4	Nelson 345 kV	Lee County	2028	391 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 planned in Illinois?: Developers have proposed 11 natural gas power plants in Illinois with 5.2 GW of capacity, according to the grid operators' interconnection queues. Most queue projects are never built.
What is the largest planned natural gas power plant in Illinois?: Jackson Generation in Will County, Illinois is the largest planned, at 1,261 MW. It is expected to come online in 2027.
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.