Diesel prices in
South Dakota.
The median diesel price in South Dakota is $6.30/gal, -$0.20 versus the national median, the 40th most expensive of 48 states with data. Tracked across 60 truck stops, refreshed multiple times per day.
Data window: last 7 days · 88 observations in South Dakota
The spread
What the $0.65 spread means for a fleet.
Stations in South Dakota range from $6.05 at the cheap end to $6.70 at the expensive end. On a single 250-gallon tractor fill, the difference between a cheap-end station and a median-priced one is about $63, on one fill, for one truck, before any negotiated discount is applied.
That spread is exactly where fuel optimization earns its keep: ValveRide Flow routes every dispatch to the right stop for the route, applies your negotiated contract rates on top of the posted price, and accounts for state fuel-tax differences so the net cost, not the pump sign, drives the decision.
Running a lane through South Dakota?
Get a free, engine-generated fuel plan for any origin and destination: where to stop, how many gallons, at what price, with South Dakota's live pricing baked in. In your inbox in about two minutes. No account needed.
Cross-border math
South Dakota vs. neighboring states
Diesel runs $0.10/gal cheaper at the median across the border in Montana. On routes that cross, where the truck fuels changes the cost of the load.
Questions, answered
South Dakota diesel prices, explained.
What is the average diesel price in South Dakota today?
The median diesel price in South Dakota is $6.30 per gallon across 60 tracked truck stops (last 7 days, 88 price observations). The cheapest 10% of stations are at or below $6.05/gal, and the most expensive 10% are at or above $6.70/gal.
Is diesel cheaper in South Dakota than the national average?
South Dakota runs -$0.20/gal versus the national median of $6.50, making it the 40th most expensive of 48 states with data. Fleets routing through South Dakota generally benefit from fueling here rather than in pricier neighboring states.
How much can a fleet save on diesel in South Dakota?
The spread between the cheap end and expensive end in South Dakota is $0.65/gal right now. On a 250-gallon fill, choosing a cheap-end station over a median-priced one saves about $63, before contract discounts and IFTA tax positioning, which is what ValveRide Flow layers on automatically for fleets.
Methodology, percentile definitions, and the full 48-state table live on the national diesel prices page.
Your trucks run through South Dakota.
Flow makes every fill count.
Live prices, your negotiated contracts, and state fuel-tax math, applied automatically on every dispatch, with every claimed dollar reconciled against a real transaction.