A recent analysis by Local Government Information Services (LGIS), which owns this publication, found almost 50,000 duplicate voter registration records, representing Illinois residents who are registered multiple times.
The data, which was pulled from the the Illinois State Board of Elections voter registration file, shows that there were 49,772 records which showed voters with the same first name, middle name, last name and birth date, and registrations at two different addresses or multiple registrations at the same address, with two unique state-issued voter identification numbers.
The total represents 24,843 unique voters, one person registered four times, 84 people registered three times and 24,758 registered two times.
Voters with multiple registrations can vote multiple times.
You can find the number of duplicate records for the South Cook area, broken down by city, in the table below:
| Alsip | 115 |
| Bedford Park | 4 |
| Belvidere | 74 |
| Bloomington | 407 |
| Blue Island | 162 |
| Bolingbrook | 278 |
| Bourbonnais | 209 |
| Bradley | 56 |
| Breese | 7 |
| Bridgeport | 10 |
| Bridgeview | 66 |
| Browning | 3 |
| Burbank | 87 |
| Burnham | 38 |
| Burr Ridge | 18 |
| Calumet City | 333 |
| Calumet Park | 117 |
| Carlyle | 13 |
| Casey | 13 |
| Centralia | 77 |
| Champaign | 903 |
| Channahon | 109 |
| Chatham | 7 |
| Chicago | 16,950 |
| Chicago Heights | 120 |
| Chicago Ridge | 52 |
| Clinton | 47 |
| Coal City | 88 |
| Country Club Hills | 118 |
| Countryside | 22 |
| Crestwood | 31 |
| De Kalb | 273 |
| Dixmoor | 16 |
| Dolton | 225 |
| Dunlap | 12 |
| Galesburg | 73 |
| East Hazel Crest | 6 |
| Edwardsville | 112 |
| Effingham | 41 |
| Elizabethtown | 4 |
| Evergreen Park | 110 |
| Fairview Heights | 12 |
| Flossmoor | 55 |
| Ford Heights | 14 |
| Frankfort | 121 |
| Frederick | 1 |
| Glenwood | 50 |
| Greenville | 24 |
| Harvey | 184 |
| Hazel Crest | 117 |
| Herrin | 32 |
| Hickory Hills | 38 |
| Highland | 16 |
| Hinsdale | 14 |
| Homer Glen | 92 |
| Hometown | 16 |
| Homewood | 107 |
| Indian Head Park | 11 |
| Justice | 99 |
| La Grange | 65 |
| La Grange Park | 49 |
| Lansing | 153 |
| Lawrenceville | 22 |
| Lemont | 64 |
| Lisle | 28 |
| Lockport | 133 |
| Lynwood | 73 |
| Mackinaw | 12 |
| Marion | 102 |
| Markham | 79 |
| Mason City | 3 |
| Matteson | 144 |
| McLeansboro | 3 |
| Merrionette Park | 15 |
| Metamora | 47 |
| Midlothian | 64 |
| Minooka | 171 |
| Mokena | 103 |
| Morris | 215 |
| Morrison | 12 |
| Morrisonville | 4 |
| Mount Zion | 9 |
| Naperville | 275 |
| New Lenox | 116 |
| Normal | 366 |
| O'Fallon | 25 |
| Oak Forest | 81 |
| Oak Lawn | 290 |
| Olive Branch | 2 |
| Olympia Fields | 31 |
| Orland Hills | 25 |
| Orland Park | 217 |
| Ottawa | 114 |
| Palos Heights | 56 |
| Palos Hills | 72 |
| Palos Park | 33 |
| Park Forest | 195 |
| Park Ridge | 176 |
| Pekin | 56 |
| Phoenix | 15 |
| Port Byron | 10 |
| Posen | 19 |
| Richton Park | 113 |
| River Forest | 53 |
| Riverdale | 174 |
| Robbins | 53 |
| Rochelle | 40 |
| Rockford | 697 |
| Rushville | 18 |
| Sauk Village | 78 |
| Smithton | 1 |
| South Chicago Heights | 17 |
| South Holland | 182 |
| Springfield | 54 |
| St. Jacob | 1 |
| Steger | 65 |
| Summit | 50 |
| Thornton | 4 |
| Tilton | 29 |
| Tinley Park | 231 |
| University Park | 112 |
| Urbana | 553 |
| Vernon Hills | 10 |
| Willow Springs | 16 |
| Willowbrook | 14 |
| Worth | 45 |
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