Kentucky diesel prices today
Kentucky diesel prices todayDiesel averages $6.23 a gallon in Kentucky on 2 October 2026 — the 29th most expensive of 51 states, and down $0.13 on the week.
Kentucky against the other states
$0.13 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 Kentucky is $4.03, so diesel costs $2.20 more per gallon — and more than premium at $5.05.
Tax on a gallon of diesel
$0.24 federal + $0.26 Kentucky · 41st highest of 51. The rest — about $5.73 — 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 Kentucky
AAA's diesel averages for 9 Kentucky metro areas, cheapest first — $0.63 a gallon between the two ends.
| Metro area | Diesel | vs state |
|---|---|---|
| Bowling Green | $5.87 | −$0.37 |
| Hopkinsville | $5.98 | −$0.26 |
| Henderson | $5.98 | −$0.25 |
| Elizabethtown & Fort Knox | $6.07 | −$0.16 |
| Owensboro | $6.16 | −$0.07 |
| Louisville | $6.28 | +$0.05 |
| Lexington | $6.35 | +$0.11 |
| Covington | $6.37 | +$0.14 |
| Ashland | $6.50 | +$0.27 |
Show the data as a table
What a diesel fill-up costs in Kentucky
- Diesel car or SUV — 18 gal$112.16
- Heavy-duty pickup — 34 gal$211.85
- Box truck — 60 gal$373.86
- Semi truck, two tanks — 250 gal$1,557.75
Diesel in neighbouring states
More for Kentucky
Frequently asked questions
How much is diesel in Kentucky today?
$6.23 a gallon, AAA's Kentucky average for 2 October 2026 — the 29th most expensive of 51 states. Regular gasoline is $4.03, so diesel costs $2.20 more per gallon.
Are diesel prices going up in Kentucky?
Diesel is down $0.13 (2.0%) on a week ago, and up $2.81 on a year ago, when it was $3.42, on AAA's own earlier averages.
Where is diesel cheapest in Kentucky?
Of the 9 metro areas AAA reports in Kentucky, Bowling Green has the cheapest diesel at $5.87 a gallon and Ashland the dearest at $6.50. Individual stations vary around these averages.
How much is the diesel tax in Kentucky?
$0.50 a gallon: $0.24 federal plus $0.26 in Kentucky state taxes and fees, the 41st highest of 51. The state average is $0.36. Rates as of 1 January 2026.
Is diesel cheaper in a neighbouring state?
Yes — Tennessee ($6.07, $0.16 less), Missouri ($6.13, $0.10 less). On a 100-gallon fill that is up to $15.80; whether it is worth the drive depends on how far the border is.