Wisconsin diesel prices today
Wisconsin diesel prices todayDiesel averages $6.37 a gallon in Wisconsin on 2 October 2026 — the 24th most expensive of 51 states, and down $0.20 on the week.
Wisconsin against the other states
$0.01 a gallon above 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 Wisconsin is $4.19, so diesel costs $2.18 more per gallon — and more than premium at $5.37.
Tax on a gallon of diesel
$0.24 federal + $0.33 Wisconsin · 23rd highest of 51. The rest — about $5.80 — 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 Wisconsin
AAA's diesel averages for 15 Wisconsin metro areas, cheapest first — $0.26 a gallon between the two ends.
| Metro area | Diesel | vs state |
|---|---|---|
| Eau Claire | $6.28 | −$0.09 |
| Pierce & St. Croix Counties | $6.30 | −$0.07 |
| La Crosse | $6.32 | −$0.05 |
| Fond du Lac | $6.34 | −$0.03 |
| Milwaukee & Waukesha | $6.35 | −$0.02 |
| Oshkosh | $6.36 | −$0.01 |
| Racine | $6.38 | +$0.01 |
| Madison | $6.39 | +$0.02 |
| Janesville & Beloit | $6.42 | +$0.05 |
| Sheboygan | $6.43 | +$0.05 |
| Superior | $6.44 | +$0.06 |
| Green Bay | $6.44 | +$0.07 |
| Appleton | $6.47 | +$0.09 |
| Wausau | $6.47 | +$0.10 |
| Kenosha County | $6.54 | +$0.17 |
Show the data as a table
What a diesel fill-up costs in Wisconsin
- Diesel car or SUV — 18 gal$114.66
- Heavy-duty pickup — 34 gal$216.58
- Box truck — 60 gal$382.20
- Semi truck, two tanks — 250 gal$1,592.50
Diesel in neighbouring states
More for Wisconsin
Frequently asked questions
How much is diesel in Wisconsin today?
$6.37 a gallon, AAA's Wisconsin average for 2 October 2026 — the 24th most expensive of 51 states. Regular gasoline is $4.19, so diesel costs $2.18 more per gallon.
Are diesel prices going up in Wisconsin?
Diesel is down $0.20 (3.0%) on a week ago, and up $2.84 on a year ago, when it was $3.53, on AAA's own earlier averages.
Where is diesel cheapest in Wisconsin?
Of the 15 metro areas AAA reports in Wisconsin, Eau Claire has the cheapest diesel at $6.28 a gallon and Kenosha County the dearest at $6.54. Individual stations vary around these averages.
How much is the diesel tax in Wisconsin?
$0.57 a gallon: $0.24 federal plus $0.33 in Wisconsin state taxes and fees, the 23rd highest of 51. The state average is $0.36. Rates as of 1 January 2026.
Is diesel cheaper in a neighbouring state?
Yes — Iowa ($6.09, $0.28 less), Minnesota ($6.21, $0.16 less). On a 100-gallon fill that is up to $27.80; whether it is worth the drive depends on how far the border is.