U.S. RANK #5 · IL 0.62% OF U.S. GENERATION

Illinois Electricity Generation & Grid Mix

In 2025, Illinois (IL) generated 195.67 TWh of electricity (0.62% of U.S. generation, ranked #5 among U.S. states). Its #1 electricity source was Nuclear at 97.67 TWh (49.9% of state output), while low-carbon sources supplied 67.3%.

2025 Generation 195.67 TWh U.S. Rank #5

#1 Power Source Nuclear 49.9% (97.7 TWh)

Low-Carbon Share 67.3% Wind + Solar: 17.3%

Fossil Share 32.6% 5Y Gen Change: +12.6%

CO2 Intensity 222 gCO2/kWh 43.5 Mt CO2 total

2025 Illinois Grid Fuel Mix Breakdown (100% = 195.67 TWh)

Nuclear: 49.9% (97.67 TWh) Natural Gas: 16.6% (32.57 TWh) Coal: 15.8% (30.90 TWh) Wind: 12.8% (25.01 TWh) Solar: 4.5% (8.75 TWh) Oil & Other Fossil: 0.2% (0.43 TWh)

GRID TELEMETRY · 2025 GENERATION MIX & 2000-2025 SERIES

Illinois (IL) Electricity Generation by Source (2025)

67.3% Low-Carbon

2025 Total Output: 195.67 TWh · Carbon Intensity: 222 gCO2/kWh

Nuclear

97.67 TWh 49.9% -3%

Natural Gas

32.57 TWh 16.6% +33%

Coal

30.90 TWh 15.8% -1%

Wind

25.01 TWh 12.8% +54%

Solar

8.75 TWh 4.5% +1629%

Oil & Other Fossil

0.43 TWh 0.2% -24%

Bioenergy

0.25 TWh 0.1% -36%

Hydroelectric

0.09 TWh 0.1% -34%

Geothermal & Other

0.01 TWh 0.0% -1%

Source: Ember Yearly Electricity Data & U.S. EIA · Unit: Terawatt-hours (TWh) #1 Power Source: Nuclear (49.9% of grid)

Illinois Historical Electricity Generation by Fuel (2001-2025)

Year	Total (TWh)	Coal	Gas	Nuclear	Hydro	Wind	Solar	Clean %	gCO2/kWh
2025	195.67	30.90	32.57	97.67	0.09	25.01	8.75	67.3%	222
2024	186.75	26.97	30.14	99.21	0.07	24.91	4.79	69.2%	208
2023	179.28	27.15	28.44	97.56	0.09	21.81	3.45	68.7%	213
2022	186.48	40.56	19.79	98.87	0.12	23.49	2.79	67.3%	241
2021	182.57	43.30	20.66	96.99	0.13	19.13	1.44	64.7%	260
2020	173.83	31.24	24.52	100.25	0.13	16.23	0.51	67.6%	227
2019	184.67	48.79	21.35	98.74	0.12	14.46	0.25	61.7%	283
2018	188.11	59.64	17.24	98.10	0.15	11.90	0.16	58.9%	314
2017	183.66	57.98	15.02	97.19	0.13	12.27	0.11	60.0%	309
2016	187.33	59.34	17.48	98.61	0.13	10.66	0.09	58.7%	315
2015	193.98	73.77	10.86	97.28	0.12	10.75	0.08	56.1%	349
2014	202.17	87.28	5.47	97.86	0.13	10.08	0.07	53.8%	377
2013	203.01	87.93	6.83	97.13	0.12	9.63	0.05	53.0%	381
2012	197.57	80.83	11.19	96.40	0.11	7.73	0.03	53.1%	373
2011	199.5	90.01	5.96	95.82	0.14	6.21	0.01	51.5%	394
2010	201.35	93.61	5.72	96.19	0.12	4.45	0.01	50.4%	404
2009	193.86	89.97	4.49	95.47	0.14	2.82	0.00	51.1%	400
2008	199.48	96.64	4.26	95.15	0.14	2.34	0.00	49.3%	415
2007	200.28	95.26	7.54	95.73	0.15	0.66	0.00	48.5%	416
2006	192.42	91.65	5.28	94.15	0.17	0.25	0.00	49.5%	412
2005	194.07	92.27	7.11	93.26	0.13	0.14	0.00	48.5%	416
2004	191.99	94.40	3.39	92.05	0.15	0.08	0.00	48.5%	422
2003	189.19	87.98	3.90	94.73	0.14	0.02	0.00	50.6%	404
2002	188.19	86.69	9.08	90.86	0.13	0.00	0.00	48.8%	410
2001	179.28	79.55	4.61	92.36	0.14	0.00	0.00	52.0%	391