Mississippi Gas Prices This Week

In the EIA’s July 2026 (revised August 2026) table of motor fuel taxes, Mississippi’s state taxes and fees on gasoline total 24.4¢ a gallon, the 14th-lowest of the 50 states and D.C. The 51-jurisdiction average is 33.8¢, and the federal tax adds 18.4¢ everywhere. The excise was 18.4¢ a gallon for decades until a 2025 law, passed alongside cuts to the income and grocery taxes, began raising it by about 3¢ a year starting July 1, 2025, to 27.4¢ in July 2027. From 2029 the rate will be adjusted every other year by a highway construction cost index. Harrison, Hancock, and Jackson counties on the coast also pay a 3¢ seawall tax on gasoline.

Mississippi has two refineries: Chevron’s Pascagoula plant, at about 356,000 barrels a day one of the larger refineries in the country, and Ergon’s refinery at Vicksburg. The Colonial and Plantation pipelines both cross the state.

Mississippi’s place in the EIA’s annual ranking has reversed over time. From 1979 through 1982 it ranked between 48th and 50th-cheapest of 51; in 1980 and 1981 its average ran 8.6¢ above and 9.4¢ above the U.S. figure. The data do not show why. Since 2013 it has ranked among the five cheapest every year, and third in 2024, at 38.7¢ below the U.S. average. Mississippi’s record annual average is $3.50 in 2022. Adjusted for inflation, the most expensive year was 1981, at $5.18 in 2025 dollars. The largest one-year increase in its record came in 1979, at 44.9%.

In the EIA’s Gulf Coast region (PADD 3), which includes Mississippi, weekly prices in October average within 0.5% of the year’s mean, then fall to 7.3% below by December.

In 2024 Mississippi averaged $2.90 a gallon, against $3.29 for the U.S. on the same basis. Among its bordering states, Alabama was the lowest at $2.89, which put Mississippi 1.0¢ above Alabama. Mississippi averaged 0.6¢ below Louisiana ($2.91), 2.5¢ below Arkansas ($2.92) and 18.2¢ below Tennessee ($3.08), the highest of the four. The 2024 figure was $2.98 in constant 2025 dollars.

Mississippi averaged below the U.S. in 47 of 55 years from 1970 to 2024 and above it in 8 of 55. The years above were 1971, 1972, 1979–1982, 1989 and 1990. The gap below the U.S. reached 39.6¢ in 2023.

Its rank was 21st-cheapest in 1970 (tied) and 50th-cheapest in 1980, then 19th-cheapest in 1990, 16th-cheapest in 2000 and 7th-cheapest in 2010. It was 3rd-cheapest in 2020. Its cheapest ranking in any year was 2nd-cheapest, in 1975, 1976, 2015 and 2017.

The largest one-year fall in the record, 29.9%, came in 2015. From 2014 to 2024 the average fell 7.4% at the pump and fell 30.1% in constant 2025 dollars. The lowest annual average in constant 2025 dollars was $1.94 in 1998. For states without a weekly EIA survey, the EIA estimates each year after 2010 from the change in the state's region, so the year-to-year moves since 2011 are the region's moves.