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People pumping gas at a gas station
Americans have felt the effects of the Iran war at the gas pump.
  • Oil and gas prices across the US have remained high amid the ongoing US-Israeli war with Iran.
  • Gas prices have dropped after spiking in May, but the national average is still over $4 per gallon.
  • Indiana has seen the biggest rise in the past month, increasing by 14%.

Since the Iran war began in late February, Americans have been feeling the effects at the gas pump.

After the conflict started, prices rose sharply across the US. The national average peaked in May at roughly $4.56 per gallon, per AAA. Gas prices then fell before climbing again, and the national average gas price was $4.11 by the end of July.

AAA's national average gas price rose by 6.73% in July, according to its Fuel Price Tracker. Only four states — Alaska, Oregon, Washington, and Hawaii — saw prices drop slightly in the past month. (Gas prices typically vary between states due to factors such as local taxes, proximity to supply, and operating costs.)

We looked at the gas prices reported by AAA on July 31 and compared them with prices reported a month ago. We then calculated the percentage increase (or decrease) for each state to determine where prices are rising the most.

In these 20 states, price increases are outpacing the national average.

20. North Carolina
People line up to fill their gas tanks at an Exxon station off Highway 40 on September 29, 2024 in Marion, North Carolina.

Average gas price (July 31): $3.79

Average price one month ago: $3.50

Increase: 8.16%

On June 13, 2022, North Carolina recorded its highest-ever average price at $4.67 a gallon.

19. Rhode Island
Arm holding a gas pump
Gas prices have increased by 8.19% in the last month in Rhode Island.

Average gas price: $4.11

Average price one month ago: $3.80

Increase: 8.19%

On June 13, 2022, Rhode Island recorded its highest-ever average price at $5.02 a gallon.

18. Tennessee
A gas pump in Nashville, Tennessee.
A gas pump in Nashville, Tennessee. In Lewis County, the average price of gas is $3.80 per gallon.

Average gas price: $3.70

Average price one month ago: $3.42

Increase: 8.25%

On June 12, 2022, Tennessee recorded its highest-ever average price at $4.64 per gallon.

17. Alabama
Buc-ee's gas pumps in Robertsdale, Alabama.
Buc-ee's gas pumps in Robertsdale, Alabama. In the past month, the average price of gas per gallon in the state rose by 35%.

Average gas price: $3.76

Average price one month ago: $3.46

Increase: 8.76%

On June 14, 2022, Alabama recorded its highest-ever average price at $4.63 per gallon.

16. Missouri
cars at a Phillips 66 gas station in Kansas City, Missouri.
Phillips 66 gas station in Kansas City, Missouri.

Average gas price: $3.81

Average price one month ago: $3.50

Increase: 8.83%

On June 16, 2022, Missouri recorded its highest-ever average price at $4.68 per gallon.

15. Wisconsin
A Kwik Trip gas pump in Wausau, Wisconsin.
A Kwik Trip gas pump in Wausau, Wisconsin.

Average gas price: $3.96

Average price one month ago: $3.64

Increase: 8.85%

On June 12, 2022, Wisconsin recorded its highest-ever average price at $4.92 per gallon.

14. Montana
A line of cars at a travel gas station in Butte, Montana.
A travel gas station in Butte, Montana.

Average gas price: $4.29

Average price one month ago: $3.94

Increase: 9.02%

On June 19, 2022, Montana recorded its highest-ever average price at $4.98 per gallon.

13. Arkansas
A vehicle getting gas pumped at a gas station in Little Rock, Arkansas.
A gas station in Little Rock, Arkansas.

Average gas price: $3.76

Average price one month ago: $3.45

Increase: 9.14%

On June 14, 2022, Arkansas recorded its highest-ever average price at $4.54 per gallon.

12. Georgia
Cars wait at a gas station in Buford, Georgia.
Gas station in Buford, Georgia.

Average gas price: $3.89

Average price one month ago: $3.56

Increase: 9.19%

On June 15, 2022, Georgia recorded its highest-ever average price at $4.50 per gallon.

11. Utah
A general view of a fuel pump at a Costco gas station in Spanish Fork, Utah, on March 10, 2026.

Average gas price: $4.28

Average price one month ago: $3.91

Increase: 9.39%

On July 1, 2022, Utah recorded its highest-ever average price at $5.26 per gallon.

10. Nebraska
Casey's gas station in Ogallala, Nebraska.
Casey's gas station in Ogallala, Nebraska.

Average gas price: $3.95

Average price one month ago: $3.61

Increase: 9.43%

On June 17, 2022, Nebraska recorded its highest-ever average price at $4.79 per gallon.

9. Colorado
Maverick gas station. One of three gas stations located at the intersection of Kipling Pkwy and Colfax Ave. in Lakewood, Colorado on Thursday, December 12, 2024.

Average gas price: $4.16

Average price one month ago: $3.80

Increase: 9.59%

On June 21, 2022, Colorado recorded its highest-ever average price at $4.92 per gallon.

8. Minnesota
Fleet Farm Fuel gas station in Waite Park, Minnesota.
Fleet Farm Fuel gas station in Waite Park, Minnesota.

Average gas price: $3.98

Average price one month ago: $3.62

Increase: 9.96%

On June 15, 2022, Minnesota recorded its highest-ever average price at $4.76 per gallon.

7. Texas
Gasoline prices are seen at a Chevron gas station in Houston, Texas, on March 16, 2026. Oil prices retreated and equities rose Monday as investors remained focused on the Strait of Hormuz, with US allies pushing back against President Donald Trump's demands to help reopen the key waterway to oil and natural gas tankers.

Average gas price: $3.63

Average price one month ago: $3.30

Increase: 10.1%

On June 15, 2022, Texas recorded its highest-ever average price at $4.70 per gallon.

6. Iowa
A Fast and Fresh Express gas station in West Des Moines, Iowa,
A Fast and Fresh Express gas station in West Des Moines, Iowa,

Average gas price: $3.85

Average price one month ago: $3.48

Increase: 10.61%

On June 15, 2022, Iowa recorded its highest-ever average price at $4.76 per gallon.

5. Oklahoma
Conoco gas station at sunrise in Sallisaw, Oklahoma.
Conoco gas station in Sallisaw, Oklahoma.

Average gas price: $3.74

Average price one month ago: $3.38

Increase: 10.79%

On June 15, 2022, Oklahoma recorded its highest-ever average price at $4.67 per gallon.

4. Arizona
A gas station in Nogales, Arizona, on October 26, 2024.

Average gas price: $4.45

Average price one month ago: $4.01

Increase: 11%

On June 17, 2022, Arizona recorded its highest-ever average price at $5.39 per gallon.

3. Maryland
A Shell gas station in Hyattsville, Maryland, US, on Tuesday July 8, 2025.

Average gas price: $4.16

Average price one month ago: $3.74

Increase: 11.38%

On June 14, 2022, Maryland recorded its highest-ever average price at $5.02 per gallon.

2. Delaware
Cars at a Shell gas station in Wilmington, Delaware.
Shell gas station in Wilmington, Delaware.

Average gas price: $4.16

Average price one month ago: $3.68

Increase: 12.92%

On June 14, 2022, Delaware recorded its highest-ever average price at $4.99 per gallon.

1. Indiana
Gas station at the Indianapolis Motor Speedway Road Course in Indianapolis, Indiana.
Gas station at the Indianapolis Motor Speedway Road Course in Indianapolis, Indiana. The average price of gas per gallon in the state has risen by 38% in the past month.

Average gas price: $3.63

Average price one month ago: $3.18

Increase: 13.98%

On June 9, 2022, Indiana recorded its highest-ever average price at $5.24 per gallon.

Read the original article on Business Insider