What Are The Highest Gas Prices Ever Recorded In Wisconsin?

There's no escaping that gas prices in Wisconsin are high right now.

As of today (September 22, 2026), the statewide average for gas prices in Wisconsin is $4.42 per gallon, which is slightly lower than the national average today of $4.47, according to AAA.

As drivers who have been around the state know, some parts of Wisconsin tend to see lower prices, and others tend to be higher than the statewide average.

While the statewide average today is $4.42 per gallon for regular unleaded gasoline, prices reported around the state are as low as $4.24 in Richland County in Southwestern Wisconsin and as high as $4.64 in Iron County in Northern Wisconsin. That's about a 20-cent-per-gallon range on either side of the average in parts of the Badger State.

Diesel Fuel, on the other hand, continues to be well over $6 per gallon in Wisconsin, with the statewide average for a gallon of diesel today (September 22) being a record high of $6.61.

With prices where they are today, how do they compare to the highest fuel prices ever recorded around Wisconsin?

Here's a breakdown of the highest fuel prices (regular unleaded and diesel) ever seen around different parts of Wisconsin as of September 22, 2026, and how they compare to today's prices, according to AAA.

Appleton

For regular unleaded gas in the Appleton area, the highest price ever recorded was $4.77 on June 14, 2022. That's $0.38 higher than today's average of $4.39.

For diesel, today's price of $6.61 is the highest price ever recorded in Appleton.

Eau Claire

For regular unleaded gas in the Eau Claire area, the highest price ever recorded was $4.81 on June 12, 2022. That's $0.48 higher than today's average of $4.33.

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For diesel, today's price of $6.42 is just one cent below the all-time high of $6.43 recorded yesterday in Eau Claire.

Fond du Lac

For regular unleaded gas in the Fond du Lac area, the highest price ever recorded was $4.79 on June 8, 2022. That's $0.39 higher than today's average of $4.40.

For diesel, today's price of $6.63 is the highest price ever recorded in Fond du Lac.

Green Bay

For regular unleaded gas in the Green Bay area, the highest price ever recorded was $4.85 on June 8, 2022. That's $0.44 higher than today's average of $4.41.

For diesel, today's price of $6.67 is the highest price ever recorded in Green Bay.

Janesville

For regular unleaded gas in the Janesville area, the highest price ever recorded was $4.82 on June 13, 2022. That's $0.47 higher than today's average of $4.35.

For diesel, today's price of $6.72 is the highest price ever recorded in Janesville.

La Crosse

For regular unleaded gas in the La Crosse area, the highest price ever recorded was $4.74 on June 14, 2022. That's $0.42 higher than today's average of $4.32.

For diesel, today's price of $6.19 is the highest price ever recorded in La Crosse.

Madison

For regular unleaded gas in the Madison area, the highest price ever recorded was $4.85 on June 12, 2022. That's $0.42 higher than today's average of $4.43.

For diesel, today's price of $6.66 is the highest price ever recorded in Madison.

Milwaukee

For regular unleaded gas in the Milwaukee area, the highest price ever recorded was $5.18 on June 8, 2022. That's $0.76 higher than today's average of $4.42.

For diesel, today's price of $6.62 is the highest price ever recorded in Milwaukee.

Oshkosh

For regular unleaded gas in the Oshkosh area, the highest price ever recorded was $4.79 on June 9, 2022. That's $0.39 higher than today's average of $4.40.

For diesel, today's price of $6.65 is the highest price ever recorded in Oshkosh.

Racine

For regular unleaded gas in the Racine area, the highest price ever recorded was $5.19 on June 12, 2022. That's $0.81 higher than today's average of $4.38.

For diesel, today's price of $6.64 is the highest price ever recorded in Racine.

Sheboygan

For regular unleaded gas in the Sheboygan area, the highest price ever recorded was $4.84 on June 8, 2022. That's $0.44 higher than today's average of $4.40.

For diesel, today's price of $6.58 is the highest price ever recorded in Sheboygan.

Superior

For regular unleaded gas in the Superior area, the highest price ever recorded was $4.86 on June 12, 2022. That's $0.41 higher than today's average of $4.45.

For diesel, today's price of $6.56 is the highest price ever recorded in Superior.

Wausau

For regular unleaded gas in the Wausau area, the highest price ever recorded was $4.93 on June 9, 2022. That's $0.50 higher than today's average of $4.43.

For diesel, today's price of $6.67 is the highest price ever recorded in Wausau.

Based on those numbers from AAA, the overall highest average regular unleaded gas price ever recorded in Wisconsin was $5.19 in Racine in June of 2022. As for diesel, the highest municipality average is $6.72 in Janesville, as of today (September 22, 2026).

We're likely to see some of these records broken, especially with diesel at record prices per gallon right now. Gas prices are, on average, $0.45 lower than record highs in Wisconsin's metro areas as of today, but have been trending upward in recent weeks.