# Heating and air conditioning companies in Illinois

There are **7,349 heating and air conditioning companies** in Illinois (CityPreferred count, October 2026). Chicago has the most (917), then Aurora (93).

## Illinois cities

**Heating and air conditioning companies in Illinois by city, October 2026**

| City | Companies |
| --- | --- |
| Chicago | 917 |
| Aurora | 93 |
| Elgin | 84 |
| Joliet | 77 |
| Naperville | 73 |
| Skokie | 68 |
| Plainfield | 65 |
| Springfield | 64 |
| Schaumburg | 61 |
| Lombard | 60 |
| Addison | 58 |
| Des Plaines | 57 |
| St. Charles | 55 |
| Oak Lawn | 55 |
| Peoria | 54 |
| Belleville | 54 |
| Rockford | 53 |
| Glenview | 52 |
| Crystal Lake | 52 |
| Bloomington | 51 |
| Downers Grove | 49 |
| Elk Grove Village | 49 |
| New Lenox | 48 |
| Arlington Heights | 48 |
| Bolingbrook | 48 |
| Northbrook | 44 |
| Orland Park | 43 |
| Palatine | 43 |
| Champaign | 42 |
| Carol Stream | 41 |
| Decatur | 39 |
| Mokena | 38 |
| Evanston | 37 |
| Wheeling | 37 |
| Frankfort | 37 |
| Algonquin | 36 |
| Waukegan | 35 |
| Roselle | 34 |
| Lake Zurich | 34 |
| Tinley Park | 34 |
| Elmhurst | 34 |
| Granite City | 34 |
| Berwyn | 33 |
| Morton Grove | 33 |
| Quincy | 33 |
| Mchenry | 33 |
| Melrose Park | 32 |
| Mundelein | 31 |
| Niles | 31 |
| Bensenville | 29 |
| Mount Prospect | 29 |
| Antioch | 29 |
| Park Ridge | 29 |
| Buffalo Grove | 29 |
| Wauconda | 28 |
| Hoffman Estates | 28 |
| Oak Park | 28 |
| Cary | 28 |
| Romeoville | 28 |
| Bridgeview | 27 |
| Collinsville | 27 |
| Wood Dale | 27 |
| Franklin Park | 26 |
| Batavia | 26 |
| Alsip | 26 |
| Westmont | 25 |
| Barrington | 25 |
| Libertyville | 25 |
| Marion | 25 |
| Lake Villa | 24 |
| Danville | 24 |
| Brookfield | 24 |
| Glendale Heights | 23 |
| Villa Park | 23 |
| Pekin | 23 |
| Bartlett | 22 |
| Wheaton | 22 |
| Oswego | 22 |
| Kankakee | 22 |
| Lisle | 22 |
| Machesney Park | 21 |
| Grayslake | 21 |
| Lake Bluff | 21 |
| Lockport | 21 |
| Galesburg | 21 |
| Lake In The Hills | 21 |
| Willowbrook | 21 |
| Freeport | 21 |
| Homer Glen | 21 |
| Oak Forest | 20 |
| Lansing | 20 |
| Edwardsville | 20 |
| West Chicago | 20 |
| East Peoria | 20 |

## Illinois and the rest of the country

Illinois has 7,349 of the 169,801 heating and air conditioning companies in the country (4%). [All states](https://citypreferred.com/data/hvac).

## What is counted

Independent businesses that do this work, for homes or for businesses. Suppliers, stores and national chains are left out. Being counted does not mean a company is licensed, insured or recommended. A city is listed when it has 20 or more. [How we count](https://citypreferred.com/data-methodology).

## Questions and answers

### How many heating and air conditioning companies are there in Illinois?

7,349, by CityPreferred's count as of October 2026.

### Which Illinois city has the most?

Chicago, with 917, followed by Aurora with 93.

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Canonical page: https://citypreferred.com/data/hvac/il

Last reviewed: 2026-10-01

Publisher: CityPreferred (https://citypreferred.com)