| Metropolitan/Nonmetropolitan Counties | County | Total law enforcement employees | Total officers | Total civilians |
|---|---|---|---|---|
| Metropolitan Counties | Alexander | 10 | 8 | 2 |
| Bond | 19 | 11 | 8 | |
| Boone | 97 | 40 | 57 | |
| Calhoun | 11 | 6 | 5 | |
| Champaign | 158 | 132 | 26 | |
| Clinton | 37 | 16 | 21 | |
| Cook | 6,837 | 2,342 | 4,495 | |
| De Kalb | 96 | 42 | 54 | |
| Du Page | 511 | 386 | 125 | |
| Ford | 25 | 8 | 17 | |
| Grundy | 57 | 28 | 29 | |
| Henry | 73 | 23 | 50 | |
| Jersey | 30 | 14 | 16 | |
| Kane | 286 | 93 | 193 | |
| Kankakee | 204 | 60 | 144 | |
| Kendall | 119 | 56 | 63 | |
| Lake | 506 | 188 | 318 | |
| Macon | 156 | 50 | 106 | |
| Macoupin | 48 | 44 | 4 | |
| Madison | 171 | 84 | 87 | |
| Marshall | 17 | 8 | 9 | |
| McHenry | 388 | 106 | 282 | |
| McLean | 135 | 55 | 80 | |
| Menard | 15 | 8 | 7 | |
| Mercer | 29 | 12 | 17 | |
| Monroe | 27 | 14 | 13 | |
| Peoria | 203 | 73 | 130 | |
| Piatt | 32 | 11 | 21 | |
| Rock Island | 158 | 63 | 95 | |
| Sangamon | 226 | 78 | 148 | |
| Stark | 13 | 5 | 8 | |
| St. Clair | 172 | 159 | 13 | |
| Tazewell | 106 | 41 | 65 | |
| Vermilion | 84 | 34 | 50 | |
| Will | 592 | 279 | 313 | |
| Winnebago | 401 | 117 | 284 | |
| Woodford | 40 | 37 | 3 | |
| Nonmetropolitan Counties | Adams | 70 | 28 | 42 |
| Brown | 6 | 5 | 1 | |
| Bureau | 37 | 20 | 17 | |
| Carroll | 25 | 9 | 16 | |
| Cass | 8 | 7 | 1 | |
| Christian | 35 | 17 | 18 | |
| Clark | 18 | 9 | 9 | |
| Clay | 17 | 11 | 6 | |
| Coles | 47 | 23 | 24 | |
| Crawford | 21 | 9 | 12 | |
| Cumberland | 12 | 8 | 4 | |
| De Witt | 41 | 16 | 25 | |
| Douglas | 32 | 14 | 18 | |
| Edgar | 19 | 8 | 11 | |
| Edwards | 12 | 4 | 8 | |
| Effingham | 44 | 20 | 24 | |
| Fayette | 32 | 11 | 21 | |
| Franklin | 46 | 17 | 29 | |
| Fulton | 45 | 22 | 23 | |
| Gallatin | 4 | 4 | 0 | |
| Greene | 14 | 6 | 8 | |
| Hamilton | 7 | 3 | 4 | |
| Hancock | 22 | 9 | 13 | |
| Hardin | 2 | 2 | 0 | |
| Henderson | 14 | 8 | 6 | |
| Iroquois | 30 | 19 | 11 | |
| Jackson | 74 | 26 | 48 | |
| Jasper | 19 | 9 | 10 | |
| Jefferson | 61 | 22 | 39 | |
| Jo Daviess | 38 | 20 | 18 | |
| Johnson | 13 | 8 | 5 | |
| Knox | 57 | 19 | 38 | |
| La Salle | 108 | 46 | 62 | |
| Lawrence | 17 | 7 | 10 | |
| Lee | 40 | 22 | 18 | |
| Livingston | 59 | 30 | 29 | |
| Logan | 37 | 20 | 17 | |
| Marion | 34 | 13 | 21 | |
| Mason | 23 | 9 | 14 | |
| Massac | 31 | 13 | 18 | |
| McDonough | 25 | 13 | 12 | |
| Montgomery | 30 | 14 | 16 | |
| Morgan | 35 | 15 | 20 | |
| Moultrie | 24 | 10 | 14 | |
| Ogle | 73 | 30 | 43 | |
| Perry | 32 | 12 | 20 | |
| Pike | 26 | 11 | 15 | |
| Pope | 5 | 2 | 3 | |
| Pulaski | 16 | 11 | 5 | |
| Putnam | 12 | 7 | 5 | |
| Randolph | 26 | 13 | 13 | |
| Richland | 24 | 8 | 16 | |
| Saline | 42 | 31 | 11 | |
| Schuyler | 9 | 3 | 6 | |
| Scott | 6 | 2 | 4 | |
| Shelby | 25 | 12 | 13 | |
| Stephenson | 81 | 29 | 52 | |
| Union | 18 | 10 | 8 | |
| Wabash | 9 | 4 | 5 | |
| Warren | 22 | 12 | 10 | |
| Washington | 21 | 10 | 11 | |
| Wayne | 23 | 10 | 13 | |
| White | 26 | 7 | 19 | |
| Whiteside | 55 | 24 | 31 | |
| Williamson | 69 | 35 | 34 |
Provides the methodology used in constructing this table and other pertinent information about this table.