Mississippi vs Tennessee gas prices
Regular gas is $0.02 a gallon cheaper in Mississippi — $0.25 on a 15-gallon fill-up. The two share a border, so that gap is worth knowing before you cross it.
Mississippi
Tennessee| Grade | MS | TN | Diff. | |
|---|---|---|---|---|
| Regular | $3.66 | $3.68 | $0.02MS | Mississippi |
| Midgrade | $4.10 | $4.13 | $0.03MS | Mississippi |
| Premium | $4.49 | $4.53 | $0.04MS | Mississippi |
| Diesel | $5.02 | $5.05 | $0.03MS | Mississippi |
Where the $0.02 gap actually comes from
All of it is tax, and then some. The fuel itself is dearer in Mississippi before tax — by $0.07 a gallon — yet it is still $0.02 cheaper at the pump, because Tennessee levies $0.09 more per gallon. Policy is doing all of the work here and overcoming a product disadvantage on the way.
Fuel, refining, distribution and marginFederal and state taxes Pre-tax figures are estimates — see the note below.
What the gap is worth
Based on today’s $0.02 per-gallon difference, which moves week to week. Use the fuel cost calculator for your own mileage and vehicle.
Prices by metro area
State averages hide a lot. These are the cheapest metros AAA reports on each side.
Other comparisons
Frequently asked questions
Is gas cheaper in Mississippi or Tennessee?
Regular gas is cheaper in Mississippi, at $3.66 a gallon against $3.68 in Tennessee — a gap of $0.02, or 0.5%. On a 15-gallon fill-up that is $0.25. Figures are AAA daily state averages for 2026-08-02.
Why is gas more expensive in Tennessee?
Entirely because of tax. Mississippi actually pays more for the fuel itself — $0.07 a gallon more before tax — but Tennessee levies $0.09 more per gallon, which more than reverses the advantage.
Is diesel cheaper in Mississippi or Tennessee?
Diesel is cheaper in Mississippi at $5.02 a gallon, against $5.05 in Tennessee — $0.03 a gallon apart.
Is it worth crossing from Tennessee into Mississippi to fill up?
If you are already near the line, yes: a 15-gallon fill saves about $0.25. Driving out of your way for it rarely pays — at $3.68 a gallon and 25 mpg, a 1-mile round trip would eat the whole saving in fuel alone, before your time.