E85 in South Dakota runs about $2.71/gal, $0.28 below the national average of $2.99 (9% cheaper). Prices below come from the national alternative-fuels database plus crowd-verified driver reports, and each station page shows exactly when its price was last confirmed.
Every E85 station in South Dakota (page 1 of 2)
| Station | Address | E85 |
|---|---|---|
| Flying J | 4200 N I-90 Service Rd, Rapid City | $1.79 |
| Midway Service | 25402 475th Ave, Baltic | $1.79 |
| Circle K #6532 | 3700 N Potsdam Ave, Sioux Falls | $1.83 |
| Midway Service Station | 25402 475th Ave, Baltic | $1.89 |
| Cowboy Country Store | 1619 N Harrison Ave, Pierre | $1.95 |
| Get N Go #14 | 5100 S Louise Ave, Sioux Falls | $1.95 |
| Get N Go #2 | 1500 W 12th St, Sioux Falls | $1.95 |
| Kwik Star #1285 | 3310 N Cliff Ave, Sioux Falls | $1.95 |
| C-Express | 2303 6th Ave SE, Aberdeen | $1.99 |
| Get N Go #12 | 1224 E 57th St, Sioux Falls | $1.99 |
| Highland Travel Plaza | 2160 Highland Way, Mitchell | $1.99 |
| Circle K | 3245 S Sycamore Ave, Sioux Falls | $2.06 |
| North Central Farmers Elevator | 811 3rd Ave SE, Aberdeen | $2.09 |
| Stone's Truck Stop | 3801 9th Ave SE, Watertown | $2.09 |
| Get N Go #16 | 2401 S Louise Ave, Sioux Falls | $2.10 |
| Get N Go #7 | 600 S Minnesota Ave, Sioux Falls | $2.10 |
| Cowboy Country Store | 504 9th Ave SE, Watertown | $2.18 |
| Cowboy Country Store | 1400 4th St NE, Watertown | $2.18 |
| Prairie Stop | 1007 9th Ave SW, Watertown | $2.18 |
| Sioux Valley Co-op - Cenex | 1016 5th St SE, Watertown | $2.18 |
| Cenex Oil Co | 2030 Lazelle St, Sturgis | $2.19 |
| Clark Community Oil - Gas Plus | 100 N Cloud St, Clark | $2.29 |
| Get N Go #15 | 6729 W 41st St, Sioux Falls | $2.30 |
| Cenex - Sioux Valley Coop Highway 212 | 1601 9th Ave SE, Watertown | $2.34 |
| Tip Top | 46399 US Highway 212, Watertown | $2.34 |
| Cork N Bottle | 1500 Broadway St, Yankton | $2.35 |
| Canyon Lake Gas & Auto | 3928 Canyon Lake Dr, Rapid City | $2.37 |
| Airport Travel Center - Circle K | 4707 6th Ave, Aberdeen | $2.62 |
| BP | 5400 E ARROWHEAD PKWY, Sioux Falls | $2.69 |
| Cenex Convenience Store & Car Wash | 11 W Highway 12, Webster | $2.71 |
| Sioux Valley Co-op - Cenex | 220 10th St NW, Watertown | $2.71 |
| Casey's | 1005 W 11th St, Sioux Falls | $2.78 |
| BP | 4915 N CLIFF AVE, Sioux Falls | $2.79 |
| BP | 5304 W 57TH ST, Sioux Falls | $2.79 |
| BP | 2401 S LOUISE AVE, Sioux Falls | $2.79 |
| BP | 6729 W 41ST ST, Sioux Falls | $2.79 |
| BP | 2421 S MINNESOTA AVE, Sioux Falls | $2.79 |
| Casey's | 1400 N Cliff Ave, Sioux Falls | $2.79 |
| Casey's | 1400 N Minnesota Ave, Sioux Falls | $2.79 |
| Casey's | 2300 Broadway Ave, Yankton | $2.79 |
| Casey's | 1201 N Yellowstone St, Fort Pierre | $2.79 |
| Clark | 47155 250th St, Baltic | $2.84 |
| Casey's | 4001 W 57th St, Sioux Falls | $2.87 |
| Casey's | 5810 E 26th St, Sioux Falls | $2.89 |
| Casey's | 412 N Sycamore Ave, Sioux Falls | $2.89 |
| Central Farmers Co-op | 131 Nebraska St, Salem | $2.89 |
| F&M Co-op Oil | 45316 Highway 34, Madison | $2.89 |
| Maverik #5161 | 32562 477th Ave, Elk Point | $2.89 |
| Casey's | 100 S Derby Ln, North Sioux City | $2.90 |
| Amoco | 1224 E 57TH ST, Sioux Falls | $2.99 |
Page 1 of 2Next →
Top cities for E85 in South Dakota
Sioux Falls (26) · Watertown (9)
Is E85 worth it in South Dakota?
E85 is usually 15–30% cheaper per gallon than regular gas, but ethanol carries ~27% less energy, so the honest test is cost per mile — E85 wins when it's priced at least 20–25% below regular. E85 App compares that for you automatically. (More: is E85 actually cheaper?)
Know what's really in the pump
Pump "E85" isn't a fixed 85% ethanol — it's legally 51–83% and drops in winter, which changes your octane and how you blend to E30/E50. (More: your E85 isn't 85%.)
Find E85 now
Live prices, the real ethanol map, and a blend calculator — free on iPhone.
Download on theApp StoreOnly flex-fuel vehicles (FFVs) should run E85 — confirm compatibility before you fill. See how to find E85 near you or browse other states.