Louisiana vs Mississippi gas prices
Regular gas is $0.00 a gallon cheaper in Mississippi — $0.05 on a 15-gallon fill-up. The two share a border, so that gap is worth knowing before you cross it.
Louisiana
Mississippi| Grade | LA | MS | Diff. | |
|---|---|---|---|---|
| Regular | $3.66 | $3.66 | $0.00MS | Mississippi |
| Midgrade | $4.12 | $4.10 | $0.02MS | Mississippi |
| Premium | $4.50 | $4.49 | $0.01MS | Mississippi |
| Diesel | $5.01 | $5.02 | $0.01LA | Louisiana |
What the gap is worth
Based on today’s $0.00 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 Louisiana or Mississippi?
Regular gas is cheaper in Mississippi, at $3.66 a gallon against $3.66 in Louisiana — a gap of $0.00, or 0.1%. On a 15-gallon fill-up that is $0.05. Figures are AAA daily state averages for 2026-08-02.
Why is gas more expensive in Louisiana?
Tax and distribution costs both contribute; a full split is unavailable this week.
Is diesel cheaper in Louisiana or Mississippi?
Diesel is cheaper in Louisiana at $5.01 a gallon, against $5.02 in Mississippi — $0.01 a gallon apart. Note that this is the opposite way round from regular gas, because the two states tax the two fuels differently.
Is it worth crossing from Louisiana into Mississippi to fill up?
If you are already near the line, yes: a 15-gallon fill saves about $0.05. Driving out of your way for it rarely pays — at $3.66 a gallon and 25 mpg, a 0-mile round trip would eat the whole saving in fuel alone, before your time.