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 that 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.
DuPage County had 837 total duplicate records, with the highest numbers coming from 275 in Naperville, 66 in Wheaton and 58 in Lombard.
Voters with multiple registrations could possibly vote multiple times.
You can find the number of duplicate records in DuPage County, broken down by city, in the table below:
| City | Duplicated Registration Records |
| Naperville | 275 |
| Wheaton | 66 |
| Lombard | 58 |
| Carol Stream | 44 |
| West Chicago | 43 |
| Elmhurst | 41 |
| Downers Grove | 40 |
| Addison | 30 |
| Lisle | 28 |
| Roselle | 26 |
| Glen Ellyn | 24 |
| Woodridge | 23 |
| Villa Park | 23 |
| Glendale Heights | 22 |
| Warrenville | 21 |
| Bloomingdale | 20 |
| Bensenville | 18 |
| Darien | 16 |
| Westmont | 15 |
| Oak Brook | 15 |
| Willowbrook | 14 |
| Hinsdale | 14 |
| Itasca | 12 |
| Clarendon Hills | 7 |
| Wood Dale | 7 |
| Winfield | 7 |
| Wayne | 6 |
| Medinah | 3 |
| Oakbrook Terrace | 2 |
| Total (DuPage County) | 837 |
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