Louisiana diesel prices today
Louisiana diesel prices todayDiesel averages $5.89 a gallon in Louisiana on 2 October 2026 — the 49th most expensive of 51 states, and down $0.11 on the week.
Louisiana against the other states
$0.48 a gallon below the unweighted mean of AAA's 51 state averages ($6.36). The cheapest diesel is in Texas at $5.79, the dearest in California at $8.38.
Regular gas in Louisiana is $3.96, so diesel costs $1.93 more per gallon — and more than premium at $4.83.
Tax on a gallon of diesel
$0.24 federal + $0.20 Louisiana · 47th highest of 51. The rest — about $5.44 — is the fuel itself, refining, distribution and the retailer’s margin.
Rates as of 1 January 2026. Local taxes, where they apply, are not included.
Diesel prices by city in Louisiana
AAA's diesel averages for 9 Louisiana metro areas, cheapest first — $0.11 a gallon between the two ends.
| Metro area | Diesel | vs state |
|---|---|---|
| Hammond | $5.83 | −$0.05 |
| Monroe | $5.84 | −$0.05 |
| Shreveport & Bossier City | $5.84 | −$0.05 |
| Houma & Thibodaux | $5.85 | −$0.04 |
| New Orleans | $5.88 | −$0.00 |
| Baton Rouge | $5.89 | +$0.00 |
| Lake Charles | $5.89 | +$0.00 |
| Lafayette | $5.91 | +$0.03 |
| Alexandria | $5.94 | +$0.06 |
Show the data as a table
What a diesel fill-up costs in Louisiana
- Diesel car or SUV — 18 gal$105.93
- Heavy-duty pickup — 34 gal$200.09
- Box truck — 60 gal$353.10
- Semi truck, two tanks — 250 gal$1,471.25
Diesel in neighbouring states
More for Louisiana
Frequently asked questions
How much is diesel in Louisiana today?
$5.89 a gallon, AAA's Louisiana average for 2 October 2026 — the 49th most expensive of 51 states. Regular gasoline is $3.96, so diesel costs $1.93 more per gallon.
Are diesel prices going up in Louisiana?
Diesel is down $0.11 (1.8%) on a week ago, and up $2.57 on a year ago, when it was $3.32, on AAA's own earlier averages.
Where is diesel cheapest in Louisiana?
Of the 9 metro areas AAA reports in Louisiana, Hammond has the cheapest diesel at $5.83 a gallon and Alexandria the dearest at $5.94. Individual stations vary around these averages.
How much is the diesel tax in Louisiana?
$0.44 a gallon: $0.24 federal plus $0.20 in Louisiana state taxes and fees, the 47th highest of 51. The state average is $0.36. Rates as of 1 January 2026.
Is diesel cheaper in a neighbouring state?
Yes — Texas ($5.79, $0.09 less). On a 100-gallon fill that is up to $9.20; whether it is worth the drive depends on how far the border is.