Map: See how gas prices have changed in the county where you live

Gas prices are up across the country, but nowhere are they up as much as in Roberts County, S.D., where an average gallon of gas would run you $4.85 a gallon Wednesday, 75% more than the price at the start of the Iran war.

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How much gas prices have increased depends on where you live, an NBC News analysis of average gas price data from AAA shows. Roberts County’s price was up $2.09 a gallon, while Clinton County, Indiana, population 33,000, prices had only increased 36 cents as of Wednesday.

It also depends on the state. In Georgia, average gas prices are up $0.98 per gallon, among the lowest state-level increases in the nation (Georgia suspended its 33 cents per gallon state gas tax in mid-March). But in Alaska, the average price is up $1.48 per gallon, the largest state-level increase in the U.S.

This map, showing the latest county-level gas prices and the change in prices since the start of the war, will be updated daily.

Polling consistently indicates that prices and the economy rank among voters’ top issues ahead of the midterm elections. A recent poll showed gas prices were a problem for nearly two-thirds of Americans.

As of May 5, counties have seen increases of an average of $1.47 per gallon. However, about 100 counties, mostly in Indiana and Ohio, have seen price increases of $2 per gallon or more. Conversely, a little more than a dozen counties — mostly in Georgia and Nebraska — have seen price increases of less than $1 per gallon.

See the trends of gas prices nationally and on the state level with the NBC News gas price tracker.

Joe Murphy is a data editor at NBC News.

Jiachuan Wu is a senior interactive journalist for NBC News Digital.