Propane Prices in South Dakota (Week of Oct 19, 2026)
Residential propane in South Dakota averaged $1.87 a gallon for the week of Oct 19, 2026 (+8.5% in two weeks) – 30% below the US average and the 4th lowest of 38 states EIA surveys.
Source: EIA Heating Oil and Propane Update (weekly, excluding taxes). Updated automatically each week from October to March.
Cost to fill a tank in South Dakota
| Delivery | Gallons | Cost at $1.87/gal |
|---|---|---|
| 20 lb grill cylinder (≈4.7 gal) | 4.7 | $8.79 |
| 100 lb cylinder (≈23.6 gal) | 23.6 | $44.13 |
| 500-gallon tank, 20% → 80% | 300 | $561.00 |
| 1,000-gallon tank, 20% → 80% | 600 | $1,122.00 |
Before sales tax, delivery minimums or small-delivery fees, which vary by dealer.
Cheapest way to heat in South Dakota right now
| Heating system | Cost per million BTU of heat |
|---|---|
| Natural gas furnace (95%) | $10.01 |
| Heat pump (HSPF2 9, COP ≈2.6) | $17.33 |
| Propane furnace (90%) | $22.72 |
| Electric baseboard (COP 1) | $45.05 |
Using South Dakota's current averages for propane, natural gas and electricity (15.37¢/kWh). Prices for natural gas in South Dakota and electricity in South Dakota.
Nearby states
Frequently asked questions
What is the price of propane in South Dakota this week?
$1.87 per gallon on average for homes in the week of Oct 19, 2026, before taxes (EIA survey). That is 30% below the US average of $2.69, and +8.5% since Oct 5, 2026.
How much does it cost to heat with propane in South Dakota?
At $1.87 a gallon, 500 gallons over a winter costs about $935 before tax. Actual use depends on the house, insulation and winter – check your past deliveries and enter them in the calculator.
Is propane cheaper than other heat in South Dakota?
Per million BTU of heat, propane costs about $22.72 in South Dakota this week. The cheapest option at current state averages is natural gas furnace (95%) at $10.01.
Source: EIA weekly residential propane prices. Heat comparison uses typical efficiencies and EIA state averages.