Largest Power Plants in Connecticut

Connecticut has 201 power plants with a combined nameplate capacity of 11,216 MW. The table below ranks the 50 largest by installed capacity — these are the facilities with the most generation potential in the state. Nameplate capacity measures the maximum output under ideal conditions; actual generation depends on fuel cost, demand, and maintenance schedules.

For a complete list of all plants in the state, visit the Connecticut state page. To find plants near a specific address, use the address lookup.

#	Plant	State	Fuel	Capacity
1	Millstone	Connecticut	Nuclear	2,260 MW
2	Middletown	Connecticut	Natural Gas	1,028 MW
3	Cpv Towantic Energy Center	Connecticut	Natural Gas	842 MW
4	Lake Road Generating Plant	Connecticut	Natural Gas	840 MW
5	Kleen Energy Systems Project	Connecticut	Natural Gas	693 MW
6	New Haven Harbor	Connecticut	Oil	642 MW
7	Milford Power Project	Connecticut	Natural Gas	578 MW
8	Bridgeport Station	Connecticut	Natural Gas	576 MW
9	Bridgeport Energy Project	Connecticut	Natural Gas	520 MW
10	Montville Station	Connecticut	Oil	495 MW
11	Wallingford Energy	Connecticut	Natural Gas	350 MW
12	Genconn Middletown Llc	Connecticut	Oil	242 MW
13	Genconn Devon Llc	Connecticut	Oil	242 MW
14	Devon Station	Connecticut	Oil	223 MW
15	Gravel Pit Solar, Llc	Connecticut	Solar	120 MW
16	Cos Cob	Connecticut	Oil	115 MW
17	Waterbury Generation	Connecticut	Natural Gas	96 MW
18	A L Pierce	Connecticut	Natural Gas	84 MW
19	Algonquin Windsor Locks	Connecticut	Natural Gas	71 MW
20	Waterside Power, Llc	Connecticut	Oil	70 MW
21	Wheelabrator Bridgeport	Connecticut	Biomass	67 MW
22	Quinebaug Solar	Connecticut	Solar	49 MW
23	Plainfield Renewable Energy Llc	Connecticut	Biomass	43 MW
24	Pfizer Groton Plant	Connecticut	Natural Gas	38 MW
25	Shepaug	Connecticut	Hydroelectric	37 MW
26	Dww Solar Ll	Connecticut	Solar	37 MW
27	Kimberly Clark-Unit 1,2,3	Connecticut	Natural Gas	36 MW
28	Rocky River (Ct)	Connecticut	Hydroelectric	31 MW
29	Stevenson	Connecticut	Hydroelectric	31 MW
30	Pratt & Whitney	Connecticut	Natural Gas	26 MW
31	Uconn Cogen Facility	Connecticut	Natural Gas	26 MW
32	Branford	Connecticut	Oil	22 MW
33	Franklin Drive	Connecticut	Oil	22 MW
34	Torrington Terminal	Connecticut	Oil	22 MW
35	Tunnel	Connecticut	Hydroelectric	21 MW
36	Fusion Solar Center Llc	Connecticut	Solar	20 MW
37	Woods Hill Solar	Connecticut	Solar	20 MW
38	Nutmeg Solar	Connecticut	Solar	20 MW
39	North Main Street	Connecticut	Oil	19 MW
40	Covanta Southeastern Connecticut Company	Connecticut	Biomass	18 MW
41	Bridgeport Fuel Cell, Llc	Connecticut	Natural Gas	17 MW
42	Rand Whitney Chp Plant	Connecticut	Natural Gas	17 MW
43	Covanta Bristol Energy	Connecticut	Biomass	16 MW
44	Foxwoods Cogen	Connecticut	Natural Gas	16 MW
45	Wallingford Solar	Connecticut	Solar	16 MW
46	North Stonington Solar Center, Llc	Connecticut	Solar	15 MW
47	Wheelabrator Lisbon	Connecticut	Biomass	15 MW
48	Derby Fuel Cell	Connecticut	Natural Gas	14 MW
49	Sr North Stonington	Connecticut	Solar	12 MW
50	Hartford Hospital Cogeneration	Connecticut	Natural Gas	12 MW

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PowerPlantsNearMe.com. (2026). Largest Power Plants in Connecticut. Derived from EIA Form 860, EIA Form 923, and EPA eGRID. Retrieved from https://powerplantsnearme.com/largest-power-plants/connecticut

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Largest Power Plants in Connecticut

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