Gas prices by state
South Dakota Gas Prices
Estimated current fuel and electricity prices for South Dakota, plus monthly and annual driving cost estimates for a typical commuter.
- Updated for 2026
- US avg fuel prices
- EV rates vary by state
- Transparent assumptions
Regular
$3.10
per gallon
Premium
$3.75
per gallon
Diesel
$3.60
per gallon
Electricity
$0.12
per kWh
Estimated driving cost in South Dakota
Monthly (1,000 mi · 27 MPG)
$115
Annual (12,000 mi)
$1378
EV monthly (1,000 mi · 3.5 mi/kWh)
$34
Key takeaway
Switch to gas, premium or EV in the fuel cost calculator or estimate a full drive with the trip cost calculator.
How South Dakota compares
Regular gas, $/gal — this state vs cheapest and priciest in the US.
Cheapest states for gas
Most expensive states
Nearby states
Commuting in South Dakota
Estimate commute fuel cost for a typical driver in these cities.
Popular South Dakota road trips
Best road trips in South Dakota → · All South Dakota routes →
How we estimate South Dakota prices
- Per-gallon prices
- State-level estimates for regular, premium and diesel calibrated to recent averages.
- Electricity rate
- Residential per-kWh rate used for EV charging cost comparisons.
- Monthly cost formula
- (monthly miles ÷ MPG) × $/gal — defaults assume ~1,000 miles/month.
- Local variation
- City prices can swing ±$0.30/gal from state averages; taxes and refinery proximity dominate.
Sources & assumptions
- EPA fuel economy data — City / highway / combined MPG and MPGe baselines.
- U.S. Department of Energy (fueleconomy.gov) — Vehicle efficiency and EV range references.
- AAA gas price trends — Recent national and regional retail fuel averages.
- EIA electricity rates — Average residential per-kWh prices used for EV charging.
We summarize publicly available data — no scraping, no external API calls. Figures are calibrated periodically; use the calculators above for your exact inputs.
FAQ
Why are South Dakota gas prices lower than the national average?
Prices reflect local fuel taxes, refining capacity, and transport costs. South Dakota currently averages about $3.10 per gallon of regular.
How much does it cost to drive 1,000 miles in South Dakota?
At $3.10/gal and 27 MPG, 1,000 miles costs about $115 in fuel. Use the trip calculator for exact estimates.
Is it cheaper to drive an EV in South Dakota?
At $0.12/kWh and 3.5 mi/kWh, 1,000 miles costs roughly $34 — typically cheaper versus gas.
How often are these prices updated?
These are rolling estimates for editorial use. Verify current prices at a local station or via AAA before fueling up.