Illinois propane prices
The last reading of the season, from the EIA's weekly survey. The series resumes in October.
per gallon · Illinois residential average
Week ending 2026-03-30 · U.S. Energy Information Administration · surveyed weekly, October through March
What Illinois propane costs to heat with
A price per gallon says nothing on its own — equipment efficiency decides how much of it reaches the room. At a mid-efficiency furnace at 90% AFUE, Illinois propane delivers heat at $24.60 per million BTU.
| Equipment | Efficiency | $ / million BTU delivered |
|---|---|---|
| Older propane furnace | 80% AFUE | $27.68 |
| Mid-efficiency | 90% AFUE | $24.60 |
| High-efficiency condensing | 95% AFUE | $23.31 |
The other heating fuels in Illinois
At today's prices natural gas delivers the same heat for less than propane does here — before any equipment cost.
| Fuel | Price | $ / million BTU delivered |
|---|---|---|
| Natural gas | $15.39/Mcf | $16.49 |
| Electricity (cold-climate heat pump) | 23.85¢/kWh | $31.77 |
| Heating oil (No. 2) PADD2 est. | $4.491/gallon | $38.60 |
| Electricity (baseboard) | 23.85¢/kWh | $69.90 |
Electricity is shown twice on purpose: a heat pump and a baseboard heater run on the same electricity but differ by a factor of two, so quoting one figure for "electric heat" would be meaningless. Combustion figures assume a 90% AFUE furnace. Nothing here includes the cost of buying or installing the equipment, which is usually what decides a switch. Figures marked as estimates are regional or national averages rather than Illinois readings, because the EIA does not survey that fuel here. How the fallbacks work.