Gas prices in South Dakota

Regular gas costs an average of $4.29 a gallon in South Dakota, and diesel $6.53, based on the Midwest regional figure for the week of September 28, 2026. That's 18 cents below the national average.

EIA doesn't publish a separate average for South Dakota, so this is the Midwest average, which covers South Dakota. Prices at individual stations vary.

Fuel	South Dakota	U.S. average
Regular	$4.29	$4.47
Diesel	$6.53	$6.38

What gas costs in South Dakota

Filling a 15-gallon tank with regular costs about $64.35. A 300-mile road trip in a car that gets 25 mpg uses 12 gallons, which comes to about $51.48.

Work out your own trip

Frequently asked questions

How much is gas in South Dakota right now?

Regular gas averages $4.29 a gallon based on the Midwest regional figure for the week of September 28, 2026.

How much is diesel in South Dakota?

Diesel averages $6.53 a gallon based on the Midwest figure.

How much does it cost to fill up in South Dakota?

A 15-gallon tank of regular costs about $64.35 at the average price.

Where do these prices come from?

The U.S. Energy Information Administration surveys retail gas stations every week and publishes averages for the nation, regions and nine states every Monday.

Gas prices in Midwest over time

Since 6 October 2025, the typical price of regular gas has risen by 136 cents.

RegularDiesel

Weekly averages from the U.S. Energy Information Administration. See national price history.

Gas prices in South Dakota

What gas costs in South Dakota

Frequently asked questions

Gas prices in Midwest over time

Gas prices in other states