Propane Prices in Montana
Montana average residential propane price
$2.14 per gallon
Week of Oct 12, 2026 · EIA value $2.141
- Change vs last week
- ↑ $0.227 (+11.9%)
- Year ago
- $1.87
- Now up 14.3% from a year ago
Compared with other prices this week
- $0.50 below the U.S. average ($2.64)
- $0.14 below the Rocky Mountain average ($2.28)
- Montana ranks #29 of 38 states (1 = highest price).
Change vs last week: ↑ $0.227 (+11.9%)
Fill a 500-gallon tank
$856.40
Fuel only at the EIA average
Typical winter propane bill
$1,803
2,000 sq ft, average insulation (our estimate)
Cold-climate heat pump
$889
About $915 less than propane (our estimate)
Cost to fill a propane tank in Montana
| Tank | Propane at 80% | Fuel cost |
|---|---|---|
| 100-gallon tank | 80 gal | $171.28 |
| 250-gallon tank | 200 gal | $428.20 |
| 500-gallon tank | 400 gal | $856.40 |
| 1000-gallon tank | 800 gal | $1,712.80 |
Fuel only at the EIA average price. Delivery fees, taxes and minimum deliveries are extra.
Montana propane price trend
Weekly EIA averages since October 2025.
Heating cost estimate for a typical Montana home
A typical Montana home (2,000 sq ft, average insulation) would use about 842 gallons of propane over the winter, roughly $1,803 at this week's price. That is an estimate; change the inputs in the calculator.
Assumes 2,000 sq ft, average insulation, AFUE 0.8, and normal October–March weather (NOAA 1991–2020).
Propane vs other heating fuels in Montana
| Fuel | Price used | Fuel needed | Est. winter cost |
|---|---|---|---|
| Heating oil | $6.138/gal (U.S. average) | 536 gallons | $3,290 |
| Propane | $2.141/gal | 842 gallons | $1,803 |
| Natural gas | $1.00/therm | 770 therms | $769 |
| Electric baseboard | $0.139/kWh | 18,061 kWh | $2,516 |
| Cold-climate heat pump | $0.139/kWh | 6,379 kWh | $889 |
Same home, same weather, each fuel at its own efficiency. Gas and electric use 12-month average prices. Estimates only.
Montana propane prices at a glance
Montana ranks #29 of 38 states for propane price this week, at $2.14 per gallon.
Prices come from EIA's weekly survey and do not include taxes or delivery fees. For a full explanation, read our methodology.
Nearby states
Propane prices in all states · Heating calculators
Frequently asked questions
What is the average propane price in Montana today?
The average residential propane price in Montana was $2.14 per gallon for the week of Oct 12, 2026, according to the U.S. Energy Information Administration (excluding taxes).
How much does it cost to fill a 500-gallon propane tank in Montana?
A 500-gallon tank holds about 400 gallons at the standard 80% fill, which is about $856.40 at $2.14 per gallon, fuel only.