Mississippi CO₂ Emissions
Mississippi emitted 65 million metric tons of energy-related CO₂ in 2024, 1.4% of the US total. That ranks it 28th among the 50 states and the District of Columbia, at 21.9 metric tons per person.
Data year 2024 · Source: U.S. Energy Information Administration, State Energy Data System (June 2026)
How much CO₂ does Mississippi emit?
Mississippi produced 65 million metric tons of carbon dioxide from burning fossil fuels in 2024. The United States as a whole emitted 4.78 billion metric tons, so Mississippi accounts for 1.4% of the national total.
Per person, that is 21.9 metric tons, 1.6 times the US average of 14.1 metric tons. On that measure Mississippi ranks 9th highest of 51.
CO₂ emissions in Mississippi since 1990
Energy-related emissions in Mississippi have risen by 34% since 1990, from 48 million metric tons to 65 million metric tons. Compared with 2005, the baseline year for many US climate targets and marked on the chart, they have risen by 1%. Emissions peaked in 2001 at 70 million metric tons and are now 7% below that level.
Emissions by sector
Electric power is the largest source of energy-related CO₂ in Mississippi, at about 42% of the total, followed by transportation at 36% and industrial at 18%.
Emissions by fuel
Natural gas produces about 55% of the state’s energy-related CO₂, petroleum 39% and coal 6%.
How Mississippi compares with other states
These are the states closest to Mississippi in the 2024 ranking by total emissions. See the full ranking of all states.
| # | State | Total (Mt) | Share of US | Per person (t) |
|---|---|---|---|---|
| 26 | South Carolina | 70.81 | 1.5% | 12.9 |
| 27 | Iowa | 65.23 | 1.4% | 20.2 |
| 28 | Mississippi | 64.75 | 1.4% | 21.9 |
| 29 | Arkansas | 58.42 | 1.2% | 18.9 |
| 30 | Massachusetts | 58.07 | 1.2% | 8.1 |
Frequently asked questions
How much CO₂ does Mississippi emit per year?
Mississippi emitted 65 million metric tons of energy-related CO₂ in 2024, which is 1.4% of the US total of 4.78 billion metric tons.
What are the CO₂ emissions per person in Mississippi?
About 21.9 metric tons per person in 2024, 1.6 times the US average of 14.1 metric tons. That ranks 9th highest of 51.
Have emissions in Mississippi fallen since 2005?
They have risen by 1% since 2005 and risen by 34% since 1990. Emissions peaked in 2001 at 70 million metric tons and are now 7% below that level.
What is the biggest source of CO₂ in Mississippi?
Electric power is the largest sector, at about 42% of energy-related emissions, followed by transportation at 36%. By fuel, natural gas accounts for 55%.
About the data. Figures are energy-related carbon dioxide emissions: CO₂ from burning coal, natural gas and petroleum, in million metric tons. Emissions from power plants are counted in the state where the electricity is generated, not where it is used. Other greenhouse gases and non-energy sources such as agriculture are not included.
Source: U.S. Energy Information Administration, State Energy Data System, released June 26, 2026. Latest year available: 2024.
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