| Cities |
|---|
| Marshall, IL4 |
| Lyons, IL2 |
| Thomasboro, IL2 |
| Trivoli, IL1 |
| Hillsdale, IL1 |
| Companies |
|---|
| Ameren Illinois Company12 |
| Commonwealth Edison Co4 |
| MidAmerican Energy Co2 |
| Direct Energy Services2 |
| First Energy Solutions Corp.1 |
| AEP Energy1 |
| Frontier Utilities, Inc.1 |
| Star Energy Partners, LLC1 |
| City | Population | Last Report | |
|---|---|---|---|
| Chicago | 2697610 | May 19, 2020 | |
| Aurora | 209153 | May 20, 2020 | |
| Rockford | 184140 | May 09, 2020 | |
| Naperville | 164753 | May 02, 2020 | |
| Springfield | 142437 | April 15, 2020 | |
| Peoria | 136101 | March 28, 2020 | |
| Joliet | 129481 | May 24, 2020 | |
| Elgin | 120465 | March 09, 2020 | |
| Waukegan | 97359 | May 02, 2020 | |
| Plainfield | 96530 | March 29, 2020 | |
| Belleville | 94297 | January 11, 2020 | |
| Champaign | 92344 | November 03, 2019 | |
| Des Plaines | 90245 | January 26, 2020 | |
| Bloomington | 85930 | March 06, 2020 | |
| Decatur | 85815 | April 08, 2020 | |
| Cicero | 83972 | March 24, 2020 | |
| Arlington Heights | 80910 | May 24, 2020 | |
| Evanston | 79561 | October 27, 2019 | |
| Palatine | 77539 | November 27, 2019 | |
| Schaumburg | 76265 | April 08, 2020 | |
| Bolingbrook | 74320 | June 27, 2019 | |
| Orland Park | 66791 | March 22, 2020 | |
| Tinley Park | 65248 | January 25, 2020 | |
| Berwyn | 63938 | March 28, 2020 | |
| Round Lake | 60828 | March 20, 2020 | |
| Skokie | 60778 | February 20, 2018 | |
| Wheaton | 60221 | October 30, 2019 | |
| Crystal Lake | 59518 | May 23, 2020 | |
| Chicago Heights | 58630 | March 06, 2020 | |
| Saint Charles | 57381 | February 05, 2020 | |
| Downers Grove | 57129 | February 08, 2020 | |
| Oak Lawn | 56791 | February 20, 2019 | |
| Mchenry | 56541 | November 27, 2019 | |
| East Saint Louis | 56114 | October 20, 2017 | |
| Mount Prospect | 55366 | January 17, 2020 | |
| Normal | 54812 | May 19, 2020 | |
| Glenview | 54355 | May 24, 2020 | |
| Lombard | 52486 | November 27, 2019 | |
| Oak Park | 51989 | April 21, 2020 | |
| Quincy | 51714 | May 10, 2020 | |
| Hoffman Estates | 50293 | June 25, 2019 | |
| Urbana | 50095 | April 14, 2019 | |
| Elmhurst | 47818 | May 02, 2020 | |
| Melrose Park | 47234 | March 01, 2020 | |
| Dekalb | 45923 | May 08, 2020 | |
| Barrington | 44930 | December 01, 2019 | |
| Moline | 44360 | May 15, 2020 | |
| Danville | 44304 | May 21, 2020 | |
| Pekin | 43456 | April 10, 2020 | |
| Elmwood Park | 43451 | December 07, 2019 | |
| Carol Stream | 43118 | June 06, 2019 | |
| Granite City | 42880 | June 17, 2019 | |
| Bartlett | 42437 | May 14, 2020 | |
| Lake Zurich | 42317 | April 13, 2020 | |
| Buffalo Grove | 41642 | May 14, 2020 | |
| Streamwood | 40916 | June 30, 2019 | |
| Northbrook | 40631 | March 29, 2020 | |
| Romeoville | 40018 | February 16, 2020 | |
| Addison | 39645 | February 17, 2020 | |
| Carpentersville | 39513 | August 18, 2019 | |
| Oswego | 39353 | January 17, 2020 | |
| Rock Island | 38744 | August 13, 2019 | |
| Hanover Park | 38518 | March 31, 2020 | |
| Wheeling | 38045 | May 23, 2020 | |
| Glen Ellyn | 37798 | March 28, 2020 | |
| Mundelein | 37763 | March 01, 2020 | |
| Park Ridge | 37567 | October 31, 2019 | |
| Gurnee | 37443 | February 17, 2020 | |
| Calumet City | 37250 | November 27, 2019 | |
| Grayslake | 36876 | May 27, 2019 | |
| West Chicago | 36164 | November 27, 2019 | |
| Kankakee | 36150 | June 30, 2019 | |
| Lockport | 35556 | April 24, 2018 | |
| Lake Villa | 35132 | May 02, 2020 | |
| New Lenox | 34921 | May 16, 2020 | |
| Glendale Heights | 34614 | April 21, 2020 | |
| Belvidere | 34552 | January 16, 2020 | |
| Carbondale | 34378 | March 14, 2019 | |
| Galesburg | 34242 | June 30, 2019 | |
| Edwardsville | 34151 | May 21, 2019 | |
| Elk Grove Village | 33733 | June 10, 2019 | |
| Algonquin | 32618 | March 20, 2020 | |
| Woodstock | 32508 | March 06, 2020 | |
| Woodridge | 32377 | December 09, 2019 | |
| Collinsville | 31937 | May 02, 2018 | |
| O Fallon | 31791 | February 16, 2020 | |
| Alton | 31742 | April 14, 2019 | |
| La Grange | 31395 | April 24, 2020 | |
| Zion | 31242 | February 22, 2020 | |
| Frankfort | 30907 | May 18, 2020 | |
| Freeport | 30695 | July 31, 2019 | |
| Harvey | 29826 | November 19, 2019 | |
| Highland Park | 29824 | May 11, 2020 | |
| Niles | 29730 | October 04, 2019 | |
| Batavia | 29502 | May 04, 2020 | |
| Bourbonnais | 29186 | February 16, 2020 | |
| Geneva | 29127 | June 30, 2019 | |
| Libertyville | 29050 | September 22, 2019 | |
| Burbank | 29047 | December 04, 2019 | |
| Lansing | 28987 | May 25, 2020 | |
| Riverdale | 28864 | February 19, 2018 | |
| Lake In The Hills | 28812 | July 05, 2019 | |
| Villa Park | 28667 | May 16, 2019 | |
| Oak Forest | 28494 | November 27, 2019 | |
| Marion | 28257 | March 23, 2019 | |
| Willowbrook | 28048 | February 11, 2020 | |
| Lisle | 27778 | April 08, 2020 | |
| Montgomery | 27438 | March 27, 2019 | |
| Deerfield | 27388 | June 25, 2019 | |
| Huntley | 27337 | November 27, 2019 | |
| Wilmette | 27304 | November 27, 2019 | |
| Jacksonville | 26948 | January 18, 2020 | |
| Vernon Hills | 26720 | April 23, 2020 | |
| Midlothian | 26201 | February 16, 2020 | |
| Cary | 25968 | May 23, 2020 | |
| Mokena | 25604 | July 20, 2019 | |
| East Peoria | 25243 | February 16, 2020 | |
| Roselle | 25045 | March 28, 2020 | |
| Charleston | 25043 | January 23, 2019 | |
| Westmont | 24772 | January 03, 2020 | |
| Washington | 24674 | February 16, 2020 | |
| Blue Island | 24629 | January 30, 2019 | |
| Antioch | 24368 | April 09, 2020 | |
| Loves Park | 24352 | February 16, 2020 | |
| Maywood | 24029 | April 01, 2020 | |
| Ottawa | 23992 | May 14, 2018 | |
| Yorkville | 23636 | February 25, 2020 | |
| Mount Vernon | 23630 | May 26, 2020 | |
| East Moline | 23609 | August 06, 2019 | |
| Harwood Heights | 23604 | April 17, 2020 | |
| Morton Grove | 23413 | May 17, 2020 | |
| Lemont | 23373 | October 10, 2019 | |
| Dixon | 23138 | September 20, 2017 | |
| South Elgin | 23068 | May 15, 2020 | |
| Darien | 23042 | April 29, 2020 | |
| Bloomingdale | 22981 | March 20, 2020 | |
| Machesney Park | 22910 | February 16, 2020 | |
| Dolton | 22796 | August 18, 2019 | |
| Alsip | 22762 | November 27, 2019 | |
| Homer Glen | 22583 | January 23, 2020 | |
| South Holland | 22517 | March 18, 2020 | |
| Sycamore | 22207 | November 10, 2019 | |
| Park Forest | 22204 | September 21, 2019 | |
| Centralia | 22125 | January 09, 2020 | |
| Rolling Meadows | 22023 | May 29, 2020 | |
| Mattoon | 21808 | November 27, 2019 | |
| Lincoln | 21505 | September 03, 2019 | |
| Sterling | 21468 | May 26, 2020 | |
| Macomb | 21464 | February 16, 2020 | |
| Matteson | 21297 | May 23, 2020 | |
| Morris | 20736 | April 30, 2018 | |
| Lake Forest | 20622 | November 27, 2019 | |
| Bensenville | 20215 | May 16, 2020 | |
| Homewood | 19978 | January 18, 2020 | |
| Evergreen Park | 19849 | January 30, 2019 | |
| Streator | 19546 | February 16, 2020 | |
| Roscoe | 19434 | January 08, 2020 | |
| Winnetka | 19204 | February 24, 2019 | |
| Bellwood | 19010 | November 06, 2019 | |
| Brookfield | 18966 | October 31, 2019 | |
| Effingham | 18925 | May 16, 2018 | |
| Crest Hill | 18267 | May 23, 2020 | |
| Shorewood | 18198 | May 23, 2020 | |
| Hinsdale | 18103 | June 26, 2019 | |
| Franklin Park | 18072 | November 13, 2019 | |
| Morton | 17847 | April 02, 2019 | |
| North Aurora | 17794 | November 27, 2019 | |
| Palos Hills | 17575 | October 03, 2017 | |
| Canton | 17232 | May 26, 2019 | |
| Country Club Hills | 17178 | August 30, 2019 | |
| Waterloo | 16903 | January 17, 2020 | |
| Westchester | 16778 | March 11, 2018 | |
| Fairview Heights | 16758 | January 06, 2018 | |
| Bridgeview | 16421 | December 01, 2019 | |
| Wauconda | 16357 | February 17, 2020 | |
| Godfrey | 16238 | April 14, 2019 | |
| Prospect Heights | 16195 | February 03, 2019 | |
| Taylorville | 15985 | February 16, 2020 | |
| Hampshire | 15985 | March 09, 2020 | |
| North Chicago | 15848 | July 20, 2019 | |
| Riverside | 15837 | February 16, 2020 | |
| Highland | 15764 | May 16, 2020 | |
| Dundee | 15705 | September 03, 2019 | |
| Crete | 15532 | October 21, 2019 | |
| Hazel Crest | 15504 | February 24, 2020 | |
| Murphysboro | 15061 | March 19, 2020 | |
| Justice | 14887 | May 23, 2020 | |
| Pontiac | 14714 | February 16, 2020 | |
| Rochelle | 14616 | September 22, 2019 | |
| Palos Heights | 14484 | March 25, 2020 | |
| Wood Dale | 14429 | June 18, 2019 | |
| Chicago Ridge | 14351 | March 31, 2020 | |
| Minooka | 14334 | February 16, 2020 | |
| Troy | 14304 | February 16, 2020 | |
| Rantoul | 14270 | March 20, 2020 | |
| Rock Falls | 14226 | February 09, 2020 | |
| Forest Park | 14137 | April 18, 2020 | |
| Richton Park | 14076 | October 21, 2019 | |
| Kewanee | 13876 | February 16, 2020 | |
| Hickory Hills | 13858 | March 23, 2020 | |
| SEE ALL ILLINOIS CITIES | |||