Illinois vs Missouri electricity prices: 17.69 ¢ against 13.49 ¢ per kWh
35 places apart: Illinois #40, Missouri #5 of 51, the widest of 31 measures. clean share with nuclear Illinois 67.7%, Missouri 23.0%; price change since 2015 Illinois +42%, Missouri +20%. Typical bills differ by $16 a month, higher in Missouri.
Over a year the typical energy bill differs by $188 ($128 a month in Illinois, $143 in Missouri). Since 2015 the home price rose +41.5% in Illinois and +20.3% in Missouri: 21.2 points more in Illinois. Against the U.S. home average Illinois sits at +2.3% and Missouri at -22.0%.
Where the power in Illinois and Missouri comes from
Fuels with the widest gaps, Illinois against Missouri.
| Fuel | Illinois | Missouri | Gap |
|---|---|---|---|
| Coal | 16.1% | 64.4% | 48.3 points, higher in Missouri |
| Nuclear | 50.9% | 10.0% | 41.0 points, higher in Illinois |
| Wind | 13.1% | 9.1% | 4.0 points, higher in Illinois |
| Gas | 16.0% | 12.4% | 3.7 points, higher in Illinois |
Illinois against Missouri: widest gaps
| Measure | Illinois | Missouri | Gap | Rank (of 51) |
|---|---|---|---|---|
| CO2 per MWh of generation, lb | 472 | 1,444 | -972 | #40 / #5 |
| Clean share with nuclear | 67.7% | 23.0% | +44.6 points | #6 / #39 |
| Price change since 2015 | +42% | +20% | +21.2 points | #11 / #43 |
| Heat pump saving on gas | -51% | +13% | -64.4 points | #41 / #10 |
| Heat pump break-even COP | 4.54 | 2.60 | +1.93 | #5 / #36 |
| Price change 2024 to 2025 | +11.5% | +4.5% | +7.0 points | #4 / #30 |
| Homes on retail supply | 25.0% | 0.0% | +25.0 points | #7 / #32 |
| Petroleum share of generation | 0.0% | 0.2% | -0.2 points | #44 / #20 |
| Business price 2025, ¢/kWh | 13.07 | 10.63 | +2.44 ¢ | #17 / #40 |
| Median household income | $81,702 | $68,920 | +$12,782 | #18 / #41 |
31 measures compared for Illinois and Missouri; the CSV holds the 10 widest.
CSVIllinois and Missouri on the map
Illinois and Missouri: price over time
Home price, Illinois and Missouri, 2010 to 2025: 16 rows
| Year | Illinois | Missouri | Gap to U.S. |
|---|---|---|---|
| 2010 | 11.52 | 9.08 | -0.02 |
| 2011 | 11.78 | 9.75 | +0.06 |
| 2012 | 11.37 | 10.17 | -0.51 |
| 2013 | 10.63 | 10.60 | -1.50 |
| 2014 | 11.91 | 10.64 | -0.61 |
| 2015 | 12.50 | 11.21 | -0.15 |
| 2016 | 12.54 | 11.21 | -0.01 |
| 2017 | 12.95 | 11.63 | +0.06 |
| 2018 | 12.77 | 11.34 | -0.10 |
| 2019 | 13.03 | 11.14 | +0.02 |
| 2020 | 13.04 | 11.22 | -0.11 |
| 2021 | 13.18 | 11.41 | -0.48 |
| 2022 | 15.65 | 11.74 | +0.61 |
| 2023 | 15.71 | 12.58 | -0.29 |
| 2024 | 15.87 | 12.91 | -0.61 |
| 2025 | 17.69 | 13.49 | +0.39 |
Illinois 11.52 to 17.69 ¢ and Missouri 9.08 to 13.49 ¢ between 2010 and 2025 (EIA).
CSVYour bill in Illinois and in Missouri
Where Illinois and Missouri are alike
- Gas share of generation: 16.0% and 12.4%
- Wind share of generation: 13.1% and 9.1%
- Major-event outage minutes: 109 and 112
Sources and dates: data sources.
Questions
Is Illinois or Missouri higher on CO2 per mwh of generation?
Missouri, by 972; they rank #40 and #5 of 51.
Is Illinois or Missouri higher on clean share with nuclear?
Illinois, by 44.6 points; they rank #6 and #39 of 51.
Is Illinois or Missouri higher on price change since 2015?
Illinois, by 21.2 points; they rank #11 and #43 of 51.
Is Illinois or Missouri higher on heat pump saving on gas?
Missouri, by 64.4 points; they rank #41 and #10 of 45.
Is Illinois or Missouri higher on heat pump break-even COP?
Illinois, by 1.93; they rank #5 and #36 of 45.
What would 878 kWh a month cost in Illinois and in Missouri?
Illinois $155, Missouri $118: $37 apart, energy only.
Where do Illinois and Missouri match most closely?
gas share of generation (16.0% and 12.4%); wind share of generation (13.1% and 9.1%); major-event outage minutes (109 and 112).