Wyoming Propane Price 2026: Cost Per Gallon, Suppliers & Delivery

Wyoming residential propane runs $2.27/gal in 2026, -15% versus the $2.67 national average and -21% versus the $2.88 West regional average. WY is among the cheapest US markets, fed by Powder River Basin NGL production, in-state refining at Sinclair (Carbon County) and Frontier Cheyenne, and a small heating-customer base spread across ranching counties. EIA does not publish a Wyoming-only series, so the figure is the PADD 4 Rocky Mountain regional estimate. Real numbers, ranch-route reality, and how LIEAP via DFS actually pays out.

Latest EIA residential propane price

Source: EIA PADD 4 Rocky Mountain residential propane estimate (no EIA Wyoming state-level series; WY is represented by the regional PADD 4 figure). Current data is the final release of the 2025/26 heating season (week ending 30 March 2026). EIA pauses weekly publication April-September; next release expected October 2026. Refreshed 26 May 2026.

Wyoming Propane Pricing Snapshot (2026)

Wyoming residential avg

$2.27/gal

EIA PADD 4 Rocky Mountain estimate (no EIA Wyoming-only series)

vs national average

-15%

National avg $2.67/gal. WY pays $0.41 less per gallon.

vs West region avg

-21%

Region avg $2.88/gal. WY sits well below the West regional norm thanks to in-state NGL supply.

Annual fuel cost (1,000 gal)

$2266

Typical Wyoming propane-heat household uses 800-1,200 gal/year

500-gallon refill (400 usable)

$906

Most common residential tank size in WY; rural routes add $0.20-$0.50/gal

Pre-buy savings (May-Aug)

$272-$408/yr

Lock-in or cap-price contracts beat winter spot pricing on a 1,000-gal household

Wyoming is one of the cheapest US markets for residential propane, alongside Texas, Oklahoma, Louisiana, and the rest of PADD 4 (Colorado, Idaho, Montana, Utah). The retail discount comes from in-state NGL supply (Powder River Basin and Green River Basin natural-gas processing) and short trucking distances to Casper, Cheyenne, and the Sinclair refinery. The catch: rural ranch-route delivery in Sweetwater, Carbon, Albany, Park, and Sheridan counties typically pays $0.20-$0.50/gal above this PADD 4 average because of route density, and Jackson Hole second-home demand carries its own premium.

Why Wyoming Propane Prices Sit Where They Do

Wyoming sits in the cheapest decile of US residential propane markets. The drivers are structural, NGL geology plus in-state refining plus a small, dispersed customer base. Understanding them tells you which knobs are actually movable when you negotiate a quote, and which are baked in.

1. Powder River Basin and Green River Basin NGL production. Wyoming hosts two of the most prolific natural-gas processing footprints in PADD 4. The Powder River Basin (Campbell, Converse, Sheridan counties) and Green River Basin (Sweetwater, Sublette counties) feed gas processing plants that strip propane and other NGLs from the gas stream. Output goes to in-state and regional terminals, eliminating the long-haul rail-from-Texas leg that drives Northeast prices up. Short supply chain equals lower per-gallon overhead.

2. Sinclair and Frontier Cheyenne in-state refining. The Sinclair refinery in Carbon County and the Frontier (HF Sinclair) refinery in Cheyenne, Laramie County, both produce LPG as a refinery byproduct alongside their gasoline and diesel output. Combined with the Casper-area refining and pipeline footprint, Wyoming has retail propane sourced within 50-200 miles of most population centers. Compare that to Connecticut, where every gallon arrives from Pennsylvania or further afield via rail-to-truck. Each handoff is a margin layer Wyoming retailers do not have to cover.

3. Black Hills Energy and SourceGas natural-gas dominance. Casper, Cheyenne, and most of Wyoming's population centers are on natural-gas distribution from Black Hills Energy and SourceGas (now part of Black Hills). Residential propane is concentrated in the rural ranching counties and second-home / mountain communities outside the gas-distribution footprint. That keeps the propane customer base small, but it also means the customers who do use propane are cold-climate primary-heat households, which gives suppliers steady annual volume rather than the small-gallon supplemental loads typical of southern states.

4. Rural route economics, the offsetting drag. Wyoming has the second-lowest population density in the US (roughly 6 people per square mile). A bobtail truck running a Sweetwater County ranch route covers 80-120 miles to deliver to 4-6 customers, versus 30 miles to 15 customers in a Casper or Cheyenne suburb. That route premium, typically $0.20-$0.50/gal, is real. It is why your actual quote in rural WY almost always lands above the $$2.27 EIA average. Owning your own tank and scheduling deliveries to coincide with neighbour tanks on the same route are the two biggest levers for shaving it.

5. Tourism and oil-and-gas commercial demand. Yellowstone, Grand Teton, and gateway communities (Jackson, Cody) generate summer concession demand that runs counter-cyclical to residential winter peak. Mineral and oil-and-gas extraction across the Powder River Basin contributes industrial commercial demand year-round. Both create steadier supplier volume bases than a pure residential market would, which is generally helpful for residential pricing. The exception is Teton County: Jackson Hole second-home demand creates a cold-month spike in a sparsely-populated county and lets local suppliers charge $0.40-$0.80/gal above the WY average.

Wyoming Propane Fill Costs by Tank Size (at $2.27/gal)

Propane tanks fill to 80% of stated capacity (the "80% rule", NFPA 58 thermal-expansion margin, not a supplier markup). Below is what each fill costs at the Wyoming PADD 4 average. Real ranch-route quotes are typically 10-25% above this number because of mileage and minimum-delivery surcharges; urban Casper, Cheyenne, and Laramie quotes often track within 5% of it.

Tank size	Usable gallons (80%)	Fill cost at $2.27/gal	vs national ($2.67/gal)
100 gal	80 gal	$181	-$33
250 gal	200 gal	$453	-$82
500 gal	400 gal	$906	-$163
1000 gal	800 gal	$1813	-$326

Compare to the national refill cost guide or check pricing in other states.

Wyoming Heating Season & Annual Use

Wyoming's residential heating season is one of the longest in the lower 48, roughly six months, late October through April, with peak demand in December, January, and February. Casper, Sheridan, Riverton, and Jackson regularly see overnight lows of -20F to -40F, and chinook-driven temperature swings can move the daily heating load by 50% inside 24 hours. Shoulder seasons (May-September) are short; June and July are essentially water-heating and cooking months for propane-heated households.

Typical Wyoming propane-heat households burn 1,000-1,400 gallons per year, at the upper end of the US range because of the cold climate and the prevalence of larger rural homes. A 2,400 sqft ranch home in Sheridan or Sublette County with propane handling space heat, water heat, range, and dryer often clears 1,300-1,500 gallons. A propane-only-for-cooking-and-water-heating household, with electric or gas space heat, runs 200-350 gallons annually.

Translated to dollars at the Wyoming average: a 1,000-gallon household pays $2266 per year for fuel alone, before tank rental, delivery surcharges, or service contracts. That is roughly $408 less than a comparable household at the national average and $614 less than the West regional average. Add ranch-route premium back for non-urban routes and the gap narrows; in Jackson Hole second-home territory, the gap can disappear entirely.

LIEAP assistance via Wyoming DFS for income-qualified households. The Wyoming Low Income Energy Assistance Program (LIEAP), administered by the Department of Family Services at dfs.wyo.gov, covers propane and other unregulated fuels for households at or below 60% of state median income. Priority for households with elderly (60+), disabled, or children age 5 and under. Apply via lieapwyo.org or call (800) 246-4221. Apply in October-November, federal funding allocations have been thin in recent years (the program briefly paused approvals in late 2025 before securing $9.6M supplemental). Crisis Intervention covers emergency fuel run-outs and broken furnaces outside the standard window.

Severe-cold winter prep is the single biggest operational rule. Never let your tank drop below 30% in winter, vapor pressure on -30F days struggles to keep up with furnace draw and you risk loss-of-fire. Schedule a top-up in late October before heating season opens, and again in late December if you are below 50%. The cost of running out during a January cold snap is the higher rate plus emergency-delivery surcharge ($75-$200) plus time waiting on a bobtail to reach you across drifted county roads.

How to Find a Licensed Propane Supplier in Wyoming

Wyoming has lighter state-level dealer licensing than most US states. The Wyoming State Fire Marshal (wsfm.wyo.gov) administers the LP-Gas Code (NFPA 58, 2020 edition) for tank installs and bulk plant safety, but most ongoing compliance sits at county level (local fire authorities) or federal (DOT for hazmat delivery, OSHA for plant operations). That puts more of the vetting burden on you. Three reliable starting points:

National Propane Gas Association (NPGA) member directory at npga.org, the national trade association lists licensed propane retailers across all 50 states, including the WY operators that have chosen to opt in.
Rocky Mountain Propane Association (RMPA) at rmpropane.org, the regional trade body covering Wyoming, Utah, Idaho, and Montana. Based in Ogden, UT. Member directory and regional safety / education programs (RMPERC) are useful credibility signals.
Wyoming State Fire Marshal at wsfm.wyo.gov, confirm any prospective supplier's bulk plant has fire marshal approval. Ask for proof of NFPA 58 certification for installs, and DOT hazmat credentials for delivery drivers.

Always get a written quote that itemises per-gallon price, delivery fee, tank rental (if applicable), minimum-delivery surcharge, and any monthly tank fee. Compare two or three quotes before committing. Per-gallon spreads of 30-50 cents within the same county are common, and ranch-route quotes in Sweetwater or Albany County can sit $0.20-$0.50/gal above the urban Casper / Cheyenne rate.

Tier-1 supplier list coming. A hand-curated list of named Wyoming propane suppliers (with HQ, coverage area, and notes on contract types) is in our editorial pipeline. We publish supplier lists only once each name has been verified against the official state licensed-dealer list and the supplier's active service-area page. We do not generate supplier names from training data; that is a hallucination risk we treat seriously.

Wyoming vs Other West States (2026)

State	Price/gal	500-gal refill (400 usable)	vs national ($2.67)
Hawaii	$4.15	$1660	+55%
Alaska	$3.85	$1540	+44%
California	$3.42	$1368	+28%
Washington	$3.02	$1208	+13%
Oregon	$2.98	$1192	+11%
Nevada	$2.95	$1180	+10%
New Mexico	$2.93	$1172	+10%
Arizona	$2.72	$1088	+2%
Idaho	$2.40	$959	-10%
Utah	$2.34	$935	-13%
Colorado	$2.30	$921	-14%
Wyoming (this page)	$2.27	$906	-15%
Montana	$2.12	$848	-21%
National average	$2.67	$1070	0%

The West region pulls in two opposing clusters. Hawaii and Alaska are persistently the most expensive US markets because of import-only logistics. California and the Pacific Northwest sit above the national average because of long supply chains and limited regional refining. The Mountain States, Wyoming, Idaho, Montana, Utah, Colorado, New Mexico, share the PADD 4 / Rocky Mountain footprint and run at or below national average thanks to in-state NGL production and refining. Wyoming is at the bottom of that PADD 4 cluster because of Powder River Basin supply and the small high-volume residential customer base.

Wyoming Propane FAQ

Am I eligible for Wyoming LIEAP propane assistance?

Wyoming runs the federal LIHEAP block grant under the name Low Income Energy Assistance Program (LIEAP), administered by the Wyoming Department of Family Services (DFS) at dfs.wyo.gov/assistance-programs/home-utilities-energy-assistance/low-income-energy-assistance-program-lieap. Households at or below 60% of state median income qualify, with priority given to families that include someone aged 60 or older, a person with a disability, or a child age 5 or under. Propane is explicitly covered as an "unregulated fuel" alongside heating oil, wood, pellets, and coal. The seasonal benefit is paid directly to your propane supplier toward winter heating; Crisis Intervention and Prevention Assistance handles emergency fuel run-outs, broken furnaces, and shut-off notices outside the standard window. Apply through the LIEAP portal at lieapwyo.org or call (800) 246-4221. Apply in October-November rather than waiting for January cold snaps, federal funding allocations and approval delays in 2025-2026 (the program briefly paused approvals before securing $9.6M in supplemental funding) showed how thin the runway can get mid-winter.

Why does EIA show Wyoming the same as Colorado, Idaho, Montana, and Utah?

Because EIA's State Heating Oil and Propane Program (SHOPP) does not publish a state-level residential propane series for Wyoming. The price you see on this page ($2.27/gal) is the PADD 4 (Rocky Mountain) regional estimate published by EIA, used as the WY proxy. PADD 4 covers Colorado, Idaho, Montana, Utah, and Wyoming, five states with similar propane sourcing patterns, similar climate-driven demand curves, and overlapping wholesale terminal infrastructure. The proxy is reasonable because Wyoming sits inside the same NGL extraction and refining footprint as the other PADD 4 states (Powder River Basin, Green River Basin, Sinclair refinery in Carbon County, Frontier Cheyenne refinery in Laramie County), but it is a regional figure, not a Wyoming-specific survey. Real Wyoming retail rates can vary materially from this number depending on how rural your delivery route is and whether your supplier sources locally or trucks in from a Casper or Cheyenne terminal.

Who regulates propane suppliers in Wyoming?

The Wyoming State Fire Marshal (wsfm.wyo.gov) administers the LP-Gas Code, which Wyoming has adopted as NFPA 58 (2020 edition) plus the relevant chapter of the International Fire Code. That covers tank installation, storage, and bulk plant safety. Wyoming has minimal state-level dealer licensing compared to states like Connecticut or Pennsylvania, many compliance requirements sit at county level (local building/fire authorities permit tank installs) or federal (DOT for bulk delivery and bobtail operations, OSHA for plant operations). The practical implication: when you vet a supplier in Wyoming, ask for proof of NFPA 58 certification, confirm their bulk plant has fire marshal approval, and verify DOT hazmat credentials for delivery drivers. Trade-body membership in the Rocky Mountain Propane Association (rmpropane.org, based in Ogden UT and covering UT/ID/WY/MT) is a useful additional credibility signal but is not a license.

Why are ranch-route propane fills more expensive than the EIA average?

Wyoming has the second-lowest population density of any US state and a customer base spread across vast cattle and sheep ranching country in Sweetwater, Carbon, Albany, Park, and Sheridan counties. A delivery route that serves three ranch tanks across 90 miles costs the supplier far more per gallon delivered than an urban Casper or Cheyenne route serving 30 tanks across 15 miles. Suppliers cover that with one or more of: a per-mile delivery surcharge, a higher minimum-delivery quantity (often 200-300 gallons rather than the 100-gallon urban minimum), a will-call premium versus auto-fill, or a flat per-gallon rural uplift of $0.20-$0.50/gal. The EIA $2.27/gal figure reflects an average across the PADD 4 regional pool, your actual ranch-route quote is likely 10-25% above it. Push back: ask for an off-peak summer fill, schedule deliveries to coincide with neighbour tanks on the same route, and own your tank outright so you can shop quotes every fill rather than being captive to a leased-tank arrangement.

How does Yellowstone and Jackson Hole tourism affect Wyoming propane pricing?

Concession-grade propane demand in Yellowstone, Grand Teton, and surrounding gateway communities (Jackson, Cody, West Yellowstone MT) creates a seasonal commercial tail that is invisible in the EIA residential figure but very real for local supply. Lodges, RV parks, food-service concessionaires, and remote backcountry generators in the parks burn propane through the May-October tourism season, which sits opposite the residential winter peak. That commercial cushion is generally helpful for residential pricing, it gives Park County and Teton County suppliers a steadier year-round volume base, which can pull per-gallon overhead down. The exception is Jackson Hole second-home demand: Teton County has one of the highest concentrations of high-end seasonal residences in the US, many of them propane-heated, and the resulting winter peak in a sparsely-populated county lets suppliers charge a meaningful "Teton premium", often $0.40-$0.80/gal above what a comparable household would pay in Casper or Cheyenne.

How should I prep for severe Wyoming winters at $2.27/gal?

Wyoming winters are no joke, Casper, Sheridan, Riverton, and Jackson regularly see overnight lows of -20F to -40F, multi-day cold snaps below 0F, and chinook-driven temperature swings that crater regulator and tank performance. Three operational rules. (1) Never let your tank drop below 30% in winter; below that, vapor pressure on the coldest days struggles to keep up with furnace draw and you risk loss-of-fire. (2) Schedule a top-up in late October or early November before the heating season opens, and again in late December if your tank is below 50%. The cost of being out of fuel during a January cold snap is the higher rate plus the emergency-delivery surcharge ($75-$200) plus the time off work waiting on a bobtail. (3) Match your tank size to your peak weekly draw: a 500-gal tank on auto-fill is the standard, but rural homes with 1,500+ sqft and propane handling space heat plus water heat plus range plus dryer should consider a 1,000-gal tank just to ride out a 7-10 day stretch where bobtails cannot reach you because of drifting on county roads. Annual cost at $2.27/gal for a typical 1,000-1,200 gal household is $2266-$2719.

When is the cheapest time to buy propane in Wyoming?

Late spring through midsummer (May to August). Wholesale propane at the PADD 4 terminal level, Casper, Cheyenne, and the Sinclair refinery in Carbon County, typically bottoms out in June-July when residential demand is near zero and natural-gas processing volumes from the Powder River Basin and Green River Basin keep NGL supply steady. Most Wyoming suppliers run pre-buy and cap-price contract enrollment between May 1 and August 31. Pre-buy locks a per-gallon rate for next winter's deliveries; cap-price sets a ceiling but lets you benefit if wholesale falls. On a 1,000-gallon annual household, locking 10-15% below winter-spot rates is worth $272-$408/year. Read the contract: confirm whether unused pre-paid gallons roll over, whether the cap survives across the heating season, and what the cancellation terms look like if you sell the property.