Arizona residents preparing to hit the road for America’s 250th will see significantly lower gas prices than they would have one month ago to fill-up their gas tanks, according to SmartAsset’s newest study.

Key findings for Arizona

  • The median household in Arizona will pay 3.7% of its weekly income on a 15-gallon fill-up this week. 
  • Still, Arizona’s average gas price of $4.05 marks a 18.9% decline since May 21, when gas cost $4.82 in Arizona. 
  • Three Pacific states — California, Hawaii, and Washington — continue to have the highest pump prices in the nation. 

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With the Fourth of July weekend approaching, millions of Americans are preparing to hit the road. Gas prices have fallen across the U.S. since reaching an annual peak on May 21, offering some relief before one of the year’s busiest driving periods. But both the extent of the price decline and the financial burden of filling a tank vary widely by state. Lower prices and higher household incomes make a fill-up relatively affordable in some states, while gas costs consume a larger share of household income in others.

SmartAsset analyzed changes in average gas prices across all 50 states between May 21 and June 28, 2026. The study also calculated each state’s gas-price burden — the cost of filling a 15-gallon tank as a share of estimated median weekly household income.

Key findings nationally

  • Gas prices have declined in every state. Since May 21, gas prices have fallen in every state, led by Colorado which has seen a 29.2% drop in the average price of a gallon of regular gasoline.
  • Prices fell by at least 20% in 13 states. Except for Colorado, all of the states with the biggest price drops are in the central and southern United States.
  • The gas-price burden remains highest in West Virginia. As in SmartAsset’s May study, the state ranks No. 1 for gas-price burden. Despite a pump price of just $3.80 per gallon, lower income levels mean the cost of a fill-up equals 4.6% of estimated median weekly household income — the national high.
  • Maryland has the lowest gas-price burden. In the Old Line State, the cost of a fill-up equals 2.7% of median weekly household income.
  • Three Pacific states continue to have the nation’s highest pump prices. A gallon of regular gasoline averages $5.52 in Hawaii, $5.46 in California and $5.20 in Washington.