Gas prices in Missouri: Midwest average and state gas tax
Looking for gas prices in Missouri? The official weekly data stops at the regional level here. The Midwest average for regular is $4.39 (September 21, 2026), which runs −9.2¢ compared with the U.S. average. How much of the price is tax? In Missouri, state taxes and fees on gasoline add up to 30.0¢ a gallon, and the federal excise brings the total to 48.4¢, about 11% of the weekly average.
The quick take
Among the 8 states that border Missouri, Oklahoma has the lightest gas tax at 20.0¢ a gallon and Illinois the heaviest at 71.7¢.
Regular gas, weekly average · Midwest
September 30, 2024: $3.105 · September 21, 2026: $4.386 · min $2.585 · max $4.405
The state's gas tax since 2015
| Rate as of | Gasoline | Diesel |
|---|---|---|
| Jul 2026 | 30.0¢ | 30.0¢ |
| Jan 2026 | 30.0¢ | 30.0¢ |
| Jul 2025 | 30.0¢ | 30.0¢ |
| Jan 2025 | 27.5¢ | 27.5¢ |
| Jul 2024 | 27.5¢ | 27.5¢ |
| Jan 2024 | 25.0¢ | 25.0¢ |
| Jul 2023 | 25.0¢ | 25.0¢ |
| Jan 2023 | 22.5¢ | 22.5¢ |
| Jul 2022 | 22.4¢ | 22.4¢ |
| Jan 2022 | 19.9¢ | 19.9¢ |
| Jul 2021 | 17.4¢ | 17.4¢ |
| Jul 2020 | 17.4¢ | 17.4¢ |
| Jan 2020 | 17.4¢ | 17.4¢ |
| Jul 2019 | 17.4¢ | 17.4¢ |
| Jan 2019 | 17.4¢ | 17.4¢ |
| Jul 2018 | 17.3¢ | 17.3¢ |
| Jan 2018 | 17.3¢ | 17.3¢ |
| Jul 2017 | 17.3¢ | 17.3¢ |
| Jan 2017 | 17.3¢ | 17.3¢ |
| Jul 2016 | 17.3¢ | 17.3¢ |
| Jan 2016 | 17.3¢ | 17.3¢ |
| Jul 2015 | 17.3¢ | 17.3¢ |
| Jan 2015 | 17.3¢ | 17.3¢ |
Neighboring states
Arkansas25.0¢Iowa30.0¢Illinois71.7¢Kansas25.0¢Kentucky26.4¢Nebraska32.7¢Oklahoma20.0¢Tennessee27.4¢
Map
Region: Midwest · Gas tax by state · Diesel prices · U.S. average