June Diesel Trends Update

The national average price of a gallon of diesel has dropped again, this week by more than 16 cents. All five regions reported lower average prices, ranging from almost 13 cents to more than 28 cents cheaper than a week ago.

Wayne Parham・Managing Editor

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June 30, 2026

Infographic titled “Average Diesel Fuel Prices: June 2026” featuring a fuel nozzle, a line chart of rising on-highway diesel prices, and a regional bar chart showing price changes across U.S. regions with directional arrows. — The average price of a gallon of diesel dropped by more than 16 cents this week, bringing the national average to under $4.70 per gallon.
Credit:
Work Truck | EIA

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The national average price of a gallon of on-highway diesel remains below $5, and prices continue to trend lower. This week, the national average price dropped by more than 16 cents.

The national average price of a gallon of on-highway diesel was $4.67 as reported on June 29 by the U.S. Energy Information Administration (EIA).

The weekly report also provides a year-over-year pricing comparison, showing the national average is now 94.1 cents higher than in 2025 and 85.5 cents higher than the same time in 2024.

This week, average prices decreased across all five regions.

The regional price average decreases ranged from 12.8 cents in the East Coast region to more than 28 cents in the West Coast region. All regions’ averages are now below $5, except for the West Coast, which was reported at $5.52 on Monday.

The most expensive place to buy diesel is Hawaii, at $6.99 per gallon, and the least costly is Oklahoma, at $4.11 per gallon.

Regional Diesel Prices: End of June

Average diesel prices reported by region, as of June 29, were:

East Coast: $4.75
Midwest: $4.58
Gulf Coast: $4.28
Rocky Mountain: $4.60
West Coast: $5.52

Regional Diesel Prices: 4th Week of June

Average diesel prices reported by region, as of June 22, were:

East Coast: $4.88
Midwest: $4.75
Gulf Coast: $4.41
Rocky Mountain: $4.79
West Coast: $5.81

Regional Diesel Prices: 3rd Week of June

Average diesel prices reported by region, as of June 15, were:

East Coast: $5.05
Midwest: $5.01
Gulf Coast: $4.64
Rocky Mountain: $5.02
West Coast: $6.07

Regional Diesel Prices: 2nd Week of June

Average diesel prices reported by region, as of June 8, were:

East Coast: $5.15
Midwest: $5.18
Gulf Coast: $4.78
Rocky Mountain: $5.20
West Coast: $6.29

Regional Diesel Prices: 1st Week of June

Average diesel prices reported by region, as of June 1, were:

East Coast: $5.23
Midwest: $5.39
Gulf Coast: $4.90
Rocky Mountain: $5.33
West Coast: $6.40

Regional Diesel Prices: 4th Week of May

Infographic titled “Average Diesel Fuel Prices: May 2026” featuring a fuel nozzle, a line chart of rising on-highway diesel prices, and a regional bar chart showing price changes across U.S. regions with directional arrows. — The average price of a gallon of diesel decreased by more than 4 cents this week, and four of the five regions saw similar price improvements.
Credit:
Work Truck | EIA

Average diesel prices reported by region, as of May 26, were:

East Coast: $5.39
Midwest: $5.62
Gulf Coast: $5.04
Rocky Mountain: $5.49
West Coast: $6.50

Will Fuel Prices Keep Going Down?

At the end of May, AAA reported crude oil prices had been dropping as a result of peace talks with Iran. However, the same report noted that the situation could be fragile and oil prices could spike again, thereby driving up the price of diesel and gasoline.

Topics:Fuel Fuel Prices & Market Trends

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