Natural Gas Price in South Dakota (2025)
Natural gas in South Dakota costs $0.95 per therm on average for homes ($9.86 per Mcf, 2025) – 36% below the US average and the 5th cheapest of 51 states and DC. The average customer's bill works out to about $47 a month over the year.
Source: EIA annual residential price (2025) and residential use per customer (2024). Latest monthly figure: $1.71/therm in July 2026 (monthly prices swing with the season).
Gas bill in South Dakota by usage
| Monthly use | South Dakota | At US average |
|---|---|---|
| 30 therms (29 ccf) | $28.52 | $44.38 |
| 60 therms (58 ccf) | $57.05 | $88.76 |
| 100 therms (96 ccf) | $95.08 | $147.93 |
| 150 therms (145 ccf) | $142.62 | $221.89 |
Average price includes delivery and fixed charges spread over all gas sold. Roughly: 30 therms is a summer month with a gas water heater and stove; 100–150 therms is a cold-climate winter month with gas heat.
Price trend
South Dakota's average residential price rose from $9.32 per Mcf in 2024 to $9.86 in 2025 (+5.8%). Nationally it went from $14.50 to $15.34.
Gas vs electricity in South Dakota
One therm of gas holds the same energy as 29.3 kWh of electricity. At South Dakota's 15.37¢/kWh, that much electricity costs $4.50 versus $0.95 for the gas. Gas furnaces turn 80–97% of that into heat, while a heat pump delivers 2–3 times the electricity it uses. Run your own numbers with the heat pump vs furnace calculator, and see electricity cost in South Dakota.
How South Dakota compares
- North Dakota: $0.92/therm, about $58/month
- New Mexico: $0.95/therm, about $47/month
- Utah: $0.98/therm, about $57/month
- Iowa: $1.02/therm, about $51/month
- US average: $1.48/therm, about $76/month.
Other West North Central states: North Dakota ($0.92), Iowa ($1.02), Minnesota ($1.06), Nebraska ($1.10), Kansas ($1.43), Missouri ($1.44).
Frequently asked questions
How much is natural gas per therm in South Dakota?
South Dakota residential customers paid an average of $0.95 per therm in 2025 ($9.86 per thousand cubic feet), including delivery charges. That is 36% below the US average of $1.48 and ranks 5th cheapest of 51.
What is the average gas bill in South Dakota?
The average South Dakota gas customer used about 57.7 Mcf (598 therms) a year in 2024, which works out to about $47 a month at 2025 prices, averaged over the year. Winter bills are much higher than summer bills.
Has natural gas gone up in South Dakota?
The average price rose from $9.32 per Mcf in 2024 to $9.86 in 2025 (+5.8%).
Is gas or electric heat cheaper in South Dakota?
Per unit of energy, gas at $0.95/therm compares with $4.50 for the same energy from electricity at 15.37¢/kWh. A heat pump delivers 2–3 units of heat per unit of electricity, so it can still beat gas – compare with your numbers in the heat pump vs furnace calculator.
Sources: EIA natural gas prices; EIA residential deliveries; EIA number of consumers.