A recent analysis by Local Government Information Services (LGIS) 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, broken down by county, in the table below:
| County | Duplicated Registration Records |
| Cook County | 27,713 |
| Will County | 2,921 |
| Champaign County | 1,845 |
| McHenry County | 1,711 |
| Kane County | 1,302 |
| Winnebago County | 915 |
| McLean County | 901 |
| DuPage County | 837 |
| Vermillion County | 755 |
| Kankakee County | 718 |
| Grundy County | 659 |
| Kendall County | 630 |
| LaSalle County | 561 |
| Adams County | 511 |
| DeKalb County | 467 |
| Madison County | 436 |
| Livingston County | 301 |
| Woodford County | 296 |
| Tazewell County | 271 |
| St. Clair County | 267 |
| Jefferson County | 253 |
| Peoria County | 252 |
| Jackson County | 229 |
| Lake County | 224 |
| Macon County | 216 |
| Stephenson County | 208 |
| Williamson County | 205 |
| Coles County | 192 |
| Rock Island County | 177 |
| Bureau County | 158 |
| Whiteside County | 145 |
| Boone County | 128 |
| Knox County | 126 |
| Ogle County | 124 |
| Macoupin County | 123 |
| Pike County | 120 |
| De Witt County | 103 |
| McDonough County | 103 |
| Jersey County | 101 |
| Clinton County | 98 |
| Iroquois County | 98 |
| Clay County | 96 |
| Lee County | 96 |
| Brown County | 93 |
| Marion County | 92 |
| Edgar County | 85 |
| Massac County | 78 |
| Douglas County | 69 |
| Piatt County | 69 |
| Morgan County | 69 |
| Henry County | 67 |
| Sangamon County | 65 |
| Ford County | 65 |
| Effingham County | 61 |
| Shelby County | 56 |
| Wayne County | 56 |
| Moultrie County | 49 |
| Lawrence County | 49 |
| Warren County | 48 |
| Montgomery County | 47 |
| Monroe County | 45 |
| Logan County | 44 |
| Christian County | 42 |
| Washington County | 42 |
| Carroll County | 41 |
| Mercer County | 38 |
| Richland County | 37 |
| Cumberland County | 37 |
| Marshall County | 35 |
| Greene County | 34 |
| Fulton County | 34 |
| Bond County | 33 |
| Crawford County | 33 |
| Clark County | 32 |
| Johnson County | 32 |
| Randolph County | 32 |
| Hancock County | 29 |
| Stark County | 28 |
| Saline County | 26 |
| Cass County | 26 |
| Schuyler County | 25 |
| Alexander County | 24 |
| Mason County | 23 |
| Jasper County | 23 |
| Perry County | 23 |
| Jo Daviess County | 22 |
| White County | 22 |
| Franklin County | 22 |
| Pope County | 21 |
| Henderson County | 18 |
| Union County | 17 |
| Fayette County | 17 |
| Wabash County | 17 |
| Scott County | 16 |
| Menard County | 15 |
| Pulaski County | 13 |
| Calhoun County | 11 |
| Edwards County | 9 |
| Hamilton County | 8 |
| Hardin County | 7 |
| Gallatin County | 6 |
| Putnam County | 3 |