Gas prices in Louisiana today
Regular gasoline in Louisiana averages $3.47 per gallon as of Monday, July 13, 2026, 40 cents per gallon below the US national average of $3.87 [EIA · 13 Jul 2026]. On-highway diesel is $4.48, -40 cents off the national diesel mean of $4.88. Refinery proximity is the cleanest example of the cost-stack: among the lowest two or three states almost every week.
Source: [EIA · 13 Jul 2026] · State excise: 20.0 cents/gal · PADD 3
Louisiana's pump-price cost stack
Every gallon you buy at the pump breaks down into five named slices. For Louisiana today, the stack looks like this:
Crude / refining / distribution shares estimated from EIA Petroleum Marketing Monthly. Federal excise from FHWA Highway Statistics. State excise from the API Motor Fuel Tax Map and Tax Foundation 2026. [EIA · 13 Jul 2026] [API · 13 Jul 2026]
Border-state comparison
For drivers crossing in or out of Louisiana, here is how the neighbours print today:
Use the border comparator to compute the per-tank savings of crossing into a cheaper neighbour, and the round-trip mileage at which the detour pays for itself.
Cheapest metro in Louisiana
Today's cheapest metro in Louisiana is generally Lake Charles. Within-state spread is typically 20-40 cents per gallon depending on county tax overlays, station brand and distance from the wholesale rack. AAA publishes metro-level detail for Louisiana updated daily.
FAQ
What is the current average price of regular gas in Louisiana?
$3.47 per gallon as of Monday, July 13, 2026, 40 cents below the national average. [EIA · 13 Jul 2026]
What is Louisiana's state gas tax?
20.0 cents per gallon state excise, plus the 18.4 cents federal excise. [API · 13 Jul 2026]
Where is gas cheapest in Louisiana today?
Lake Charles is typically the cheapest metro. Regional spread is normal at 20-40 cents per gallon.