Illinois propane prices per gallon this week
Illinois propane averaged $1.943 a gallon in the EIA survey of October 19, 2026.
Propane, Illinois, week of October 19, 2026
$1.943/gal
| 150 gallons at this price | $291 |
| Change from the week before | +$0.039 |
| Same week a year ago | $1.736 (+11.9 %) |
| Average of last winter (2025-26, November to March) | $1.936 |
| Wholesale price the same week | $1.173 (dealer spread $0.770) |
| U.S. average | $2.689 |
EIA weekly survey of October 19, 2026, excluding taxes. Next release October 28, 2026.
Compiled by Radif Partners · Where the prices come from · EIA survey of , published October 21, 2026, excluding taxes
Three Illinois homes in four heat with utility gas, the 2nd highest share among the states in the EIA's propane survey, so propane is a minority fuel here. The Census Bureau's 2024 survey still counts 192,729 Illinois homes heated mainly with it, 3.8 % of occupied homes. In the EIA's weekly survey of October 19, 2026, Illinois propane averaged $1.943 a gallon, 33rd of 38 states counting from the dearest, and $0.746 below the U.S. average. Last winter the state averaged $1.936 from November to March. A normal Illinois winter brings 5,035 heating degree days over those months, so the EIA's average Midwest propane home would burn about 672 gallons, which is $1,306 at this week's average. The EIA does not survey heating oil in Illinois. Prices exclude taxes and delivery fees.
Wholesale and the dealer's share
The EIA publishes a wholesale propane price for Illinois, $1.173. Set against the residential average, that leaves $0.770 a gallon for delivery, storage, the tank and the dealer, 40 % of what a household pays. On a 250-gallon fill, that share comes to $193. Because most of the price is the margin rather than the fuel, a sharp move in the wholesale market shows up only partly in the residential average.
Propane fill in Illinois
Cost to fill your propane tank
$486
| Gallons the delivery adds | 250 gallons |
| Illinois average, October 19, 2026 | $1.943/gal |
| Same fill at last year's price ($1.736) | $434 |
| Full tank from empty, same price | $777 |
Illinois propane, season by season
Last winter the Illinois average ranged from $1.724 to $2.204, its high week on February 9, 2026. The highest week the survey has recorded in Illinois is $2.504, on March 14, 2022. Since 2014-15, the November to March average finished above the mid-October price in 12 of 12 seasons, with a median change of 7.6 %. The lock-in check replays those winters against a dealer's fixed price.
Illinois against its neighbors
This week Illinois propane is $0.616 cheaper than Indiana's, $0.003 dearer than Wisconsin's, $0.239 dearer than Iowa's and $0.238 cheaper than Missouri's. These are state averages, and individual dealers on either side of a state line set their own prices. The propane table ranks all 38 surveyed states.
Heating a propane home in an Illinois winter
NOAA's normals give Illinois 1,159 heating degree days in December, 1,281 in January and 1,041 in February, weighted by population. Those three months carry 69 % of the season's total, so a tank filled in October may need a second fill by midwinter. The days-left calculator turns a gauge reading into a date using these normals, and the winter budget spreads the cost month by month. Per million Btu at the ENERGY STAR furnace rating, Illinois propane heat costs $24 this week; the comparison page sets it against electricity. The federal LIHEAP income ceiling for four people in Illinois is $79,405 a year.
What a delivery costs in Illinois at this week's average
| Fuel | Price a gallon | Order | Order | Order | Order |
|---|---|---|---|---|---|
| Propane | $1.943 | 100 gal: $194 | 250 gal: $486 | 400 gal: $777 | 800 gal: $1,554 |
Propane in Illinois, winter by winter
| Winter | Mid-October | November to March average | Season high |
|---|---|---|---|
| 2026-27 | $1.904 | in progress | $1.943 (October 19, 2026) |
| 2025-26 | $1.732 | $1.936 | $2.204 (February 9, 2026) |
| 2024-25 | $1.771 | $1.932 | $2.076 (February 24, 2025) |
| 2023-24 | $1.772 | $1.882 | $1.946 (February 12, 2024) |
| 2022-23 | $2.078 | $2.109 | $2.144 (January 23, 2023) |
| 2021-22 | $2.175 | $2.284 | $2.504 (March 14, 2022) |
| 2020-21 | $1.332 | $1.652 | $2.164 (February 22, 2021) |
| 2019-20 | $1.286 | $1.595 | $1.817 (November 25, 2019) |
| 2018-19 | $1.610 | $1.641 | $1.654 (December 17, 2018) |
| 2017-18 | $1.608 | $1.775 | $1.929 (January 22, 2018) |
| 2016-17 | $1.417 | $1.591 | $1.776 (February 6, 2017) |
| 2015-16 | $1.305 | $1.327 | $1.362 (February 15, 2016) |
| 2014-15 | $1.760 | $1.793 | $1.827 (December 22, 2014) |