SmartAsset’s latest study finds Arizona is No. 1 when it comes to rising gas prices  over the last year. 

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Key findings: 

  • Over the last 12 months, the cost of a gallon of gasoline in Arizona has increased 37.8%, now standing at $4.70. This puts Arizona at No. 1 in the U.S. when it comes to how much the price of gasoline has increased since last year. 
  • Meanwhile, the price of diesel in Arizona is now at $6.04.
  • Nationwide, Minnesota has realized the lightest impact (10.6%) in gas prices. 

With gas prices in the U.S. hitting several-year highs as a result of military operations in the Middle East and subsequent pressure on the Strait of Hormuz, many households may be feeling the squeeze of the cost of their commute lately.  As of April 1st, the national average price of a regular gallon stands at $4.06. Many states have experienced a 33% year-over-year increase in the cost of a gallon of regular gas – and in some places it’s even higher. Commercial and public programs may be feeling similarly pinched, with diesel prices upwards of $6.00 per gallon in many states.

With this in mind, SmartAsset ranked the states by the price of a gallon of regular gas, and examined other gas price data over the past year.

Key Findings

  •  Regular gas reaches $5.89 per gallon in California. California has the highest average gas price nationwide, after a 21.4% increase year over year. Mid-grade fuel will cost you $6.13 per gallon, while premium is averaging $6.32. Diesel is $7.52.
  •  Gas prices increased most in Arizona; Florida. In both states, prices increased by just over 37% since one year ago. The cost of a regular gallon in Arizona is now $4.70, or sixth highest nationwide. In Florida, the cost is 10th highest at $4.22 per gallon.
  • Oklahoma now has the least expensive gas. Despite a 18.3% year-over-year increase, the cost is lowest in Oklahoma at $3.27 per regular gallon. Exactly one year ago, the cost was lowest in Mississippi, at $2.69 per gallon.
  • Diesel costs increased by over 60% in these states. Those utilizing diesel face the most severe cost increases in Arizona (68.8% increase); South Carolina (62.6%); Nevada (62.5%); Texas (60.9%); North Carolina (60.9%); and Florida (60.7%). Nationwide, the average cost of a gallon of diesel increased 50.2% since last year, up from $3.62 to $5.43.