Rocky Mountain region
WyomingGas prices
EIA doesn’t publish a weekly price for Wyoming on its own. This figure starts from the Rocky Mountain average of $4.417 for the week of October 5, 2026 and adjusts it for Wyoming’s fuel tax, which is 7.9¢ a gallon below the regional norm. How we estimate it.
Rocky Mountain prices this week
The regional averages Wyoming’s figures are drawn from, in dollars per gallon.
- Regular
- $4.417
- Down $0.069 on the week
- Midgrade
- $4.749
- Down $0.061 on the week
- Premium
- $5.097
- Down $0.079 on the week
- Diesel
- $6.267
- Down $0.140 on the week
The regional price is near its most expensive point of the past year: over the past 52 weeks it has run from $2.403 to $4.587, averaging $3.541. It has moved +2.4% over four weeks and +20.7% over thirteen.
How much of a gallon is tax
Wyoming charges 24.0¢ a gallon in state tax, the 40th highest of 51 (the 50 states and D.C.). With the federal tax that is 42.4¢, about 10% of the pump price.
| State excise tax | 23.00¢ |
|---|---|
| Other state taxes and fees | 1.00¢ |
| Federal excise tax | 18.40¢ |
| Total per gallon | 42.40¢ |
| On a 15-gallon fill | $6.36 |
| Over a year of typical driving | $204 |
From EIA’s notes for Wyoming: License Tax: $0.0100/gal.
Source: EIA federal and state motor fuel taxes, July 2026. A typical year assumes 480 gallons (about 12,000 miles at 25 mpg). Local sales taxes are not included.
Fuel tax in Wyoming and its neighbours
Wyoming has the lowest fuel tax of its neighbours. Drivers coming in from Utah pay 14.5¢ a gallon less in state tax here, $2.18 on a 15-gallon fill.
| State | State tax | Versus WY | On a 15-gal tank |
|---|---|---|---|
| Wyoming | 24.0¢ | — | — |
| South Dakota | 30.0¢ | +6.0¢ | +$0.90 |
| Colorado | 30.2¢ | +6.2¢ | +$0.93 |
| Nebraska | 32.7¢ | +8.7¢ | +$1.31 |
| Idaho | 33.0¢ | +9.0¢ | +$1.35 |
| Montana | 33.8¢ | +9.8¢ | +$1.46 |
| Utah | 38.5¢ | +14.5¢ | +$2.18 |
What driving in Wyoming costs
- A 15-gallon fill
- $65.07
- A year of typical driving
- $2,082
- Versus the national average
- $8 a year less
Planning a drive? The fuel cost calculator prices a trip at this week’s Wyoming figure, for your own car.
How we estimate the Wyoming price
The U.S. Energy Information Administration surveys retail gasoline prices every Monday, but it reports individual figures for only nine states. Wyoming is counted in the Rocky Mountain series, which averages it together with Colorado, Idaho, Montana and Utah.
Within one region, crude oil, refining and most delivery costs are shared. The biggest fixed difference from one state to the next is tax, which reaches the pump almost cent for cent. So we take the regional average and add the gap between Wyoming’s tax (24.0¢) and the average tax across the region’s states (31.9¢).
Local taxes, how busy the local market is and how far the state is from a refinery all move real prices too, so treat this as a guide to within a few cents, not a quote. Our methodology covers how every figure on the site is sourced.
Gas prices in Wyoming
- How much is gas in Wyoming right now?
- Regular gasoline in Wyoming is estimated at about $4.34 a gallon this week. That starts from the EIA's Rocky Mountain average of $4.417 and adjusts it for Wyoming's fuel tax, which is 7.9¢ a gallon below the average across the region's states. The national average is $4.354.
- How much is the gas tax in Wyoming?
- Wyoming charges 23.00¢ a gallon in state excise tax plus 1.00¢ in other per-gallon taxes and fees, 24.00¢ in all. That ranks 40 of 51 (the 50 states and D.C.), highest first. With the 18.4¢ federal tax, a gallon carries 42.4¢ of tax.
- Is gas cheaper in a state next to Wyoming?
- Not on tax. Wyoming already has the lowest state fuel tax among its neighbours, so any cheaper price across the line would come from local competition rather than tax.
- Why is there no official weekly gas price for Wyoming?
- The EIA's weekly survey samples about 1,000 stations nationwide, enough for reliable regional averages and for nine large states, but not for every state on its own. Wyoming is counted in the Rocky Mountain series, which is updated every Monday and published on Tuesday.