Find your fireplace, wherever Illinois winters take you.

Two very different heating climates, one state line.

Illinois runs nearly 400 miles from the Wisconsin border to the tip of Cairo, and the heating math changes the whole way down. Chicago and the northern counties sit in IECC zone 5A with a heating season about as demanding as Minneapolis or Duluth—cold enough that the region gets compared to those cities for winter severity, and Lake Michigan's wind adds a wind-chill bite that flat, open prairie doesn't soften. Drop south to Springfield or Peoria and you're in zone 4A with a noticeably shorter, milder heating season; by the time you reach Cairo near the Ohio River confluence, milder river-valley winters push heating demand down to roughly two-thirds of what Chicago sees. A gas insert sized for a Rogers Park two-flat is overbuilt for a farmhouse outside Cairo, and a wood stove that barely keeps up in a Rockford winter would be more than enough downstate.

This page is the starting point, not the answer. Chicago and the collar counties lean heavily on natural gas from utilities like Peoples Gas and Nicor Gas, especially in condos and townhomes where direct-vent gas units solve tight clearance problems that a masonry chimney can't. Downstate and in the river-bottom counties, wood heat stays common—abundant oak and hickory from Shawnee-adjacent timber keep cordwood stoves practical for farmhouses and acreages. Pellet stoves show up statewide, fed in part by Illinois-based Indeck Energy Services along with regional suppliers like Lignetics and Somerset Pellet Fuel. Electric units fill in wherever venting is restricted or impossible, particularly in Chicago high-rises. Enter your zip and fuel above, or browse by county or city below, and you'll end up connected to a local hearth retailer who understands what's actually right for your part of the state.