Energy

Mapped: How Much Gas Prices Have Risen Since the Iran War

Published

August 28, 2026 9:14 am

Sofie Gilbert

Design

Tatiana Rusconi

How Much Gas Prices Have Risen Since the Iran War

Key Takeaways

U.S. gas prices have risen about 44% from their pre-war baseline, adding an average of $1.25 per gallon.
The largest percentage increases are concentrated across the Midwest and Mountain West, with several states up more than 60%.
States that were already among the most expensive for gas have generally seen smaller percentage increases.

Gas prices have climbed sharply across the U.S. following the outbreak of the Iran War, but the size of the increase varies significantly by state.

Using AAA price data from February 18, 2026, as a pre-war baseline and prices as of August 20, 2026, this visualization maps the percentage increase across all 50 states and Washington, D.C.

Which States Saw the Biggest Gas Price Increases

Iowa has seen the largest percentage increase in the country, with gas prices jumping 69.1% from $2.45 to $4.14 per gallon. Oklahoma follows closely at 68.8%, while Colorado, Minnesota, and Wyoming have each seen increases of more than 60%.

Montana, New Mexico, North Dakota, South Dakota, and Kansas round out the top 10, each up more than 57%.

The table below shows the full breakdown of price changes by state, sorted from largest to smallest percentage change.

State	Pre-War Price (Feb 18 2026)	Current Price (Aug 20 2026)	$ Change	% Change
Iowa	$2.45	$4.14	$1.69	69.1%
Oklahoma	$2.29	$3.87	$1.58	68.8%
Colorado	$2.76	$4.48	$1.72	62.2%
Minnesota	$2.57	$4.16	$1.59	61.8%
Wyoming	$2.70	$4.37	$1.67	61.8%
Montana	$2.75	$4.39	$1.64	59.7%
New Mexico	$2.61	$4.14	$1.53	58.5%
North Dakota	$2.54	$4.01	$1.47	57.7%
South Dakota	$2.59	$4.08	$1.49	57.7%
Kansas	$2.47	$3.88	$1.41	57.1%
Utah	$2.79	$4.38	$1.59	57.0%
Nebraska	$2.59	$4.04	$1.45	56.1%
Arkansas	$2.46	$3.80	$1.34	54.6%
Wisconsin	$2.55	$3.94	$1.39	54.4%
Missouri	$2.52	$3.89	$1.37	54.3%
Ohio	$2.70	$4.12	$1.42	52.6%
Idaho	$2.97	$4.49	$1.52	51.3%
Mississippi	$2.49	$3.66	$1.17	47.2%
Illinois	$2.99	$4.40	$1.41	47.1%
Louisiana	$2.51	$3.69	$1.18	47.0%
Michigan	$2.92	$4.21	$1.29	44.0%
Kentucky	$2.59	$3.70	$1.11	43.0%
Texas	$2.55	$3.64	$1.09	42.8%
Alabama	$2.63	$3.74	$1.11	42.2%
Tennessee	$2.58	$3.66	$1.08	41.9%
Connecticut	$2.90	$4.10	$1.20	41.5%
Arizona	$3.16	$4.47	$1.31	41.4%
Georgia	$2.71	$3.82	$1.11	41.1%
New Hampshire	$2.85	$4.01	$1.16	40.6%
Massachusetts	$2.90	$4.04	$1.14	39.4%
Rhode Island	$2.87	$4.00	$1.13	39.2%
Maine	$2.92	$4.06	$1.14	39.1%
New York	$3.00	$4.15	$1.15	38.3%
Alaska	$3.50	$4.83	$1.33	38.1%
South Carolina	$2.67	$3.68	$1.01	38.0%
Vermont	$3.00	$4.14	$1.14	37.9%
Virginia	$2.81	$3.86	$1.05	37.5%
District of Columbia	$3.09	$4.21	$1.12	36.1%
North Carolina	$2.77	$3.77	$1.00	36.1%
West Virginia	$2.85	$3.87	$1.02	35.9%
Florida	$2.91	$3.95	$1.04	35.6%
New Jersey	$2.94	$3.99	$1.05	35.6%
Maryland	$2.92	$3.94	$1.02	35.0%
Delaware	$2.87	$3.87	$1.00	34.8%
Pennsylvania	$3.11	$4.14	$1.03	33.0%
Nevada	$3.64	$4.78	$1.14	31.2%
Indiana	$2.75	$3.56	$0.81	29.6%
Oregon	$3.71	$4.76	$1.05	28.3%
Washington	$4.17	$5.24	$1.07	25.7%
Hawaii	$4.40	$5.43	$1.03	23.4%
California	$4.59	$5.59	$1.00	21.8%

Many of the states with the largest percentage increases started from relatively low pre-war prices, which magnified the percentage change as crude prices rose.

Oklahoma, for example, had the lowest baseline price in the country at $2.29 per gallon and has since climbed nearly 69%.

How Much More Americans Are Paying at the Pump

Across the country, the average increase works out to roughly $1.25 per gallon, or about 44% from the pre-war baseline.

That translates to an extra $15 for a 12-gallon fill-up. At roughly 450 gallons of fuel consumed per vehicle each year, based on Federal Highway Administration data, a sustained $1.25-per-gallon increase would add about $560 to annual fuel costs.

The increases followed a major global oil supply disruption after the Iran War closed the Strait of Hormuz, pushing oil prices sharply higher as roughly 10 million barrels per day were taken off the market.

The impact extends well beyond the pump. As a single barrel of oil feeds thousands of everyday products, from plastics to pharmaceuticals, higher crude prices can ripple across the broader economy.

Why the Least Affected States Still Pay the Most

The states with the smallest percentage increases were largely those already paying the most. High fuel taxes and climate-related fuel policies, including carbon pricing programs in California and Washington, help keep baseline prices elevated.

California also uses a state-mandated fuel blend that cannot easily be supplemented with gasoline from outside the state.

Hawaii faces a different constraint: as an island chain with no pipeline access, its fuel must be shipped in, adding a persistent logistical premium to each gallon.

California saw the smallest increase at 21.8%, followed by Hawaii at 23.4% and Washington at 25.7%. Yet all three remain the most expensive states in the country, at $5.59, $5.43, and $5.24 per gallon, respectively.

Learn More on the Voronoi App

If you enjoyed this graphic, check out Charted: The World’s Biggest Oil Producers on Voronoi.

Related Topics:united states gas prices oil and gas cost of living iran by state oil and gas industry gas price iran war

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Maps

Mapped: Gas Prices by U.S. State in 2026

Gas prices may be high nationwide, but living in one state or another can amount to over $30 difference at the pump.

Published

September 29, 2026 9:53 am

Gabriel Cohen

Map of the U.S. showing the average fuel price per gallon in each state as of late September 2026.

Where Gas Is Most Expensive in America

Key Takeaways

The average price of gas in the U.S. is $4.48 per gallon as of September 2026, up more than a dollar from the previous year.
California has the highest average gas price in the country at $6.24 per gallon, while Texas and Indiana tie for the lowest at $3.96.
Filling a 15-gallon tank costs about $34 more in California than in the two cheapest states.

Where you fill up can make a significant difference in what you pay at the pump.

This map shows average regular gasoline prices across the U.S. using September 2026 data from AAA Fuel Tracker. Prices are per gallon and rounded to the nearest cent.

Where Gas Prices Run Highest and Lowest

The broader divide is regional. The highest fuel prices are concentrated in the West, while much of the South sits below the $4.48 national average.

The table below ranks prices from highest to lowest in the 50 states and Washington, D.C.

Rank	State or District	Average Gas Price in September 2026 ($)
1	California	6.24
2	Hawaii	5.57
3	Washington	5.55
4	Nevada	5.37
5	Oregon	5.09
6	Alaska	5.07
7	Idaho	5.00
8	Utah	4.98
9	Illinois	4.85
10	Michigan	4.81
11	Arizona	4.78
12	Montana	4.61
13	Pennsylvania	4.55
13	Wyoming	4.55
15	New Mexico	4.53
16	Connecticut	4.49
16	New York	4.49
18	Vermont	4.46
19	District of Columbia	4.43
19	Maine	4.43
19	Ohio	4.43
22	Massachusetts	4.40
22	Nebraska	4.40
22	New Jersey	4.40
25	Rhode Island	4.39
25	Wisconsin	4.39
27	Florida	4.38
28	Minnesota	4.37
28	New Hampshire	4.37
28	West Virginia	4.37
31	Delaware	4.35
32	Iowa	4.33
32	Maryland	4.33
34	South Dakota	4.32
35	Colorado	4.31
36	North Dakota	4.26
37	Virginia	4.24
38	Missouri	4.18
39	Kansas	4.17
40	Kentucky	4.16
41	North Carolina	4.13
42	Oklahoma	4.12
43	Georgia	4.11
44	Alabama	4.09
45	Arkansas	4.06
45	Tennessee	4.06
47	South Carolina	4.05
48	Louisiana	4.03
49	Mississippi	4.00
50	Indiana	3.96
50	Texas	3.96
--	🇺🇸 U.S. National Average	4.48

Part of the difference reflects the journey fuel takes to reach a station. Longer distances from refineries, ports, and distribution terminals can mean higher transportation costs, which can push up retail prices.

States such as Louisiana and Texas also benefit from extensive oil and refining infrastructure, helping keep distribution costs relatively low.

Why California Costs So Much More

California’s premium goes beyond taxes. The Golden State requires a special gasoline blend designed to reduce air pollution, which costs more to produce. State environmental programs also add compliance costs for fuel suppliers, alongside state and local taxes.

The state’s specialized fuel comes from a relatively limited pool of suppliers. California is geographically separated from major U.S. refining centers along the Gulf Coast, and only some refineries elsewhere can produce gasoline that meets its requirements. Bringing in additional supply is therefore more complicated than simply sourcing cheaper fuel from another state.

This becomes especially important when a refinery shuts down for maintenance or experiences an unexpected outage. Replacement supplies can take time to arrive, leaving the market more vulnerable to price spikes. The same factors that keep California expensive under normal conditions can make disruptions more painful for drivers.

No Relief This Fall

Gas prices usually ease after the summer driving season. Demand falls as travel slows, while cooler weather allows refiners to use less expensive gasoline components that would evaporate too easily in summer heat. The seasonal change in fuel requirements can help reduce costs even without a decline in global oil prices.

This September, however, that usual pattern has been disrupted. Expensive crude oil and continued volatility in the Strait of Hormuz have pushed up prices at the pump. The national average of $4.48 per gallon is the highest on record for late September.

Local advantages offer only partial protection from those pressures. Gasoline prices generally track crude oil costs, so even states with lower distribution costs and taxes remain exposed to oil-market disruptions.

Learn More on the Voronoi App

To compare these prices with major global events, check out Oil Prices and Geopolitical Events on Voronoi.

Oil and Gas

Who Controls the World’s Diesel Exports?

The U.S. supplied 15.4% of global diesel exports in 2025, leading a market where five countries shipped nearly half the total.

Published

September 26, 2026 3:03 am

Niccolo Conte

cropped treemap of 2025 diesel exports by country, grouped by region, led by the United States, Russia, and Saudi Arabia.

The Countries Behind Global Diesel Supply

Key Takeaways

The United States exported 1.26 million barrels of diesel per day in 2025, accounting for 15.4% of global exports.
The five largest exporters supplied 46.9% of the global total, led by the U.S., Russia, and Saudi Arabia.
The U.S. and Russia together accounted for nearly a quarter of global diesel exports in 2025, underscoring the significance of current export restrictions and proposals.

Diesel powers the trucks, farm equipment, and ships that keep goods moving, making its availability a concern far beyond the fuel pump.

The United States is the world’s largest diesel exporter, accounting for a significant share of global supply. Now, potential U.S. export restrictions are drawing attention as Russia has already moved to restrict its own diesel exports.

This graphic shows 2025 diesel exports by country, based on the annual average of monthly data from the Joint Organisations Data Initiative (JODI) and the Organization of the Petroleum Exporting Countries (OPEC).

Which Countries Export the Most Diesel?

The United States exported 1.26 million barrels per day, ahead of Russia’s 783,400 and Saudi Arabia’s 678,200. India and South Korea rounded out the top five, each shipping more than half a million barrels daily.

America’s large refining system helps underpin that lead. As of January 2026, the U.S. had 130 operable refineries with 18.2 million barrels per day of crude distillation capacity.

The table below shows the world’s top diesel-exporting countries in 2025:

Rank	Country or region	Diesel exports in 2025
Rank	Country or region	Thousand barrels per day	Share of global exports (%)
1	🇺🇸 United States	1,264	15.4
2	🇷🇺 Russia	783.4	9.5
3	🇸🇦 Saudi Arabia	678.2	8.3
4	🇮🇳 India	567.1	6.9
5	🇰🇷 South Korea	561.1	6.8
6	🇳🇱 Netherlands	459.8	5.6
7	🇸🇬 Singapore	365.9	4.5
8	🇰🇼 Kuwait	289.2	3.5
9	🇧🇪 Belgium	230.5	2.8
10	🇩🇪 Germany	214.3	2.6
11	🇲🇾 Malaysia	207.1	2.5
12	🇨🇦 Canada	184.8	2.2
13	🇮🇹 Italy	161.8	2.0
14	🇹🇼 Taiwan	159.2	1.9
15	🇨🇳 China	132	1.6
16	🇬🇷 Greece	122.8	1.5
17	🇪🇸 Spain	115.3	1.4
18	🇯🇵 Japan	101.2	1.2
19	🇸🇪 Sweden	97.8	1.2
20	🇧🇭 Bahrain	92	1.1
21	🇹🇷 Türkiye	78.9	1.0
22	🇹🇭 Thailand	71.4	0.9
23	🇧🇳 Brunei	66.3	0.8
24	🇬🇧 United Kingdom	60.4	0.7
25	🇸🇰 Slovakia	59.4	0.7
26	🇫🇷 France	52.3	0.6
27	🇱🇹 Lithuania	51.1	0.6
28	🇩🇰 Denmark	48.4	0.6
29	🇵🇱 Poland	46.7	0.6
30	🇳🇬 Nigeria	46.6	0.6
31	🇳🇴 Norway	44.4	0.5
32	🇭🇺 Hungary	39.9	0.5
33	🇲🇽 Mexico	38	0.5
34	🇫🇮 Finland	36.8	0.4
35	🇸🇮 Slovenia	31.6	0.4
36	🇦🇹 Austria	26.4	0.3
37	🇭🇷 Croatia	24.6	0.3
38	🇷🇴 Romania	21.4	0.3
39	🇨🇿 Czechia	18.7	0.2
40	🇧🇷 Brazil	12.6	0.2
	Rest of Latin America	42.7	0.5
	Rest of Europe	77.4	0.9
	Rest of Middle East	170.8	2.1
	Rest of Africa	115.2	1.4
	Rest of Asia-Pacific	146.9	1.8
	World	8216.4	100.0

The UAE, Iran, and Iraq are not listed separately because comparable 2025 data are unavailable.

Together, the Netherlands, Singapore, and Belgium account for 12.9% of exports, but much of that is re-exported fuel. All three are trading hubs that import diesel, store and blend it, then ship it onward, so their export totals overstate what their own refineries produce.

By region, Europe leads with 35.3% of global diesel exports, though Russia alone accounts for more than a quarter of that total.

Region	Diesel Exports 2025 (Thousand Barrels per Day)	Share of World Exports
Europe	2,904.1	35.3%
Asia-Pacific	2,378.2	28.9%
North America	1,486.8	18.1%
Middle East	1,230.2	15.0%
Africa	161.8	2.0%
Latin America	55.3	0.7%
World	8,216.4	100.0%

Much of the rest is intra-European trade, with refiners in Germany, Italy, and Spain shipping to neighboring countries. The continent is still a net diesel importer overall, relying on cargoes from the U.S., India, and the Middle East to cover the gap.

Asia-Pacific follows at 28.9%, supported by export-oriented refiners in India, South Korea, and Singapore.

Why Diesel Export Restrictions Matter Globally

The U.S. lead has taken on new significance as Washington weighs export restrictions. President Donald Trump backed the idea on September 22, 2026, although a White House official disputed a reported 90-day ban plan the following day.

Russia, meanwhile, introduced broad diesel export restrictions in July, with the measures subsequently extended through September. Together, the two countries supplied nearly a quarter of global diesel exports in 2025.

For the countries buying American oil and fuels, U.S. export restrictions could reduce access to a major supplier. Analysts have also warned that losing export markets could prompt U.S. refiners to cut output, potentially reducing production of gasoline and jet fuel alongside diesel.

The debate highlights a potential trade-off: restricting exports could keep more diesel in the U.S. in the short term, but if weaker export demand leads refiners to process less crude, they would also produce less gasoline and jet fuel.