South Carolina diesel prices today
South Carolina diesel prices todayDiesel averages $5.91 a gallon in South Carolina on 2 October 2026 — the 48th most expensive of 51 states, and down $0.18 on the week.
South Carolina against the other states
$0.45 a gallon below the unweighted mean of AAA's 51 state averages ($6.36). The cheapest diesel is in Texas at $5.79, the dearest in California at $8.38.
Regular gas in South Carolina is $3.97, so diesel costs $1.95 more per gallon — and more than premium at $4.82.
Tax on a gallon of diesel
$0.24 federal + $0.29 South Carolina · 36th highest of 51. The rest — about $5.38 — is the fuel itself, refining, distribution and the retailer’s margin.
Rates as of 1 January 2026. Local taxes, where they apply, are not included.
Diesel prices by city in South Carolina
AAA's diesel averages for 10 South Carolina metro areas, cheapest first — $0.27 a gallon between the two ends.
| Metro area | Diesel | vs state |
|---|---|---|
| Spartanburg | $5.79 | −$0.13 |
| Greenville | $5.83 | −$0.08 |
| Myrtle Beach | $5.85 | −$0.06 |
| Rock Hill | $5.92 | +$0.01 |
| Aiken & Edgfield Counties | $5.94 | +$0.02 |
| Columbia | $5.94 | +$0.02 |
| Charleston & North Charleston | $5.94 | +$0.03 |
| Florence | $5.96 | +$0.04 |
| Hilton Head & Bluffton | $6.03 | +$0.12 |
| Sumter | $6.06 | +$0.15 |
Show the data as a table
What a diesel fill-up costs in South Carolina
- Diesel car or SUV — 18 gal$106.42
- Heavy-duty pickup — 34 gal$201.01
- Box truck — 60 gal$354.72
- Semi truck, two tanks — 250 gal$1,478.00
Diesel in neighbouring states
More for South Carolina
Frequently asked questions
How much is diesel in South Carolina today?
$5.91 a gallon, AAA's South Carolina average for 2 October 2026 — the 48th most expensive of 51 states. Regular gasoline is $3.97, so diesel costs $1.95 more per gallon.
Are diesel prices going up in South Carolina?
Diesel is down $0.18 (2.9%) on a week ago, and up $2.49 on a year ago, when it was $3.42, on AAA's own earlier averages.
Where is diesel cheapest in South Carolina?
Of the 10 metro areas AAA reports in South Carolina, Spartanburg has the cheapest diesel at $5.79 a gallon and Sumter the dearest at $6.06. Individual stations vary around these averages.
How much is the diesel tax in South Carolina?
$0.53 a gallon: $0.24 federal plus $0.29 in South Carolina state taxes and fees, the 36th highest of 51. The state average is $0.36. Rates as of 1 January 2026.