| Metropolitan/Nonmetropolitan | County | Total law enforcement employees | Total officers | Total civilians |
|---|---|---|---|---|
| Metropolitan Counties | Bond | 19 | 11 | 8 |
| Boone | 91 | 35 | 56 | |
| Calhoun | 4 | 4 | 0 | |
| Champaign | 148 | 124 | 24 | |
| Clinton | 38 | 16 | 22 | |
| Cook | 6,807 | 2,503 | 4,304 | |
| De Kalb | 93 | 41 | 52 | |
| Du Page | 546 | 430 | 116 | |
| Ford | 22 | 7 | 15 | |
| Grundy | 60 | 29 | 31 | |
| Henry | 74 | 23 | 51 | |
| Jersey | 26 | 13 | 13 | |
| Kane | 139 | 96 | 43 | |
| Kankakee | 193 | 67 | 126 | |
| Kendall | 103 | 95 | 8 | |
| Lake | 468 | 182 | 286 | |
| Macon | 156 | 49 | 107 | |
| Macoupin | 52 | 47 | 5 | |
| Madison | 172 | 81 | 91 | |
| Marshall | 16 | 7 | 9 | |
| McHenry | 367 | 101 | 266 | |
| McLean | 115 | 50 | 65 | |
| Menard | 16 | 8 | 8 | |
| Mercer | 28 | 11 | 17 | |
| Monroe | 29 | 14 | 15 | |
| Peoria | 190 | 62 | 128 | |
| Piatt | 33 | 10 | 23 | |
| Rock Island | 156 | 65 | 91 | |
| Sangamon | 231 | 76 | 155 | |
| Stark | 11 | 4 | 7 | |
| St. Clair | 178 | 163 | 15 | |
| Tazewell | 104 | 41 | 63 | |
| Vermilion | 84 | 34 | 50 | |
| Will | 520 | 270 | 250 | |
| Winnebago | 332 | 106 | 226 | |
| Woodford | 41 | 38 | 3 | |
| Nonmetropolitan Counties | Adams | 60 | 27 | 33 |
| Alexander | 7 | 7 | 0 | |
| Brown | 7 | 6 | 1 | |
| Bureau | 34 | 20 | 14 | |
| Carroll | 22 | 9 | 13 | |
| Cass | 8 | 7 | 1 | |
| Christian | 35 | 17 | 18 | |
| Clark | 10 | 9 | 1 | |
| Clay | 15 | 8 | 7 | |
| Coles | 45 | 25 | 20 | |
| Crawford | 19 | 9 | 10 | |
| Cumberland | 18 | 7 | 11 | |
| De Witt | 39 | 15 | 24 | |
| Douglas | 30 | 10 | 20 | |
| Edgar | 19 | 8 | 11 | |
| Edwards | 6 | 3 | 3 | |
| Effingham | 45 | 19 | 26 | |
| Fayette | 42 | 10 | 32 | |
| Franklin | 39 | 16 | 23 | |
| Fulton | 43 | 22 | 21 | |
| Gallatin | 2 | 2 | 0 | |
| Greene | 14 | 6 | 8 | |
| Hamilton | 7 | 3 | 4 | |
| Hancock | 24 | 9 | 15 | |
| Hardin | 7 | 4 | 3 | |
| Henderson | 14 | 8 | 6 | |
| Iroquois | 31 | 18 | 13 | |
| Jackson | 72 | 25 | 47 | |
| Jasper | 19 | 9 | 10 | |
| Jefferson | 63 | 24 | 39 | |
| Jo Daviess | 36 | 18 | 18 | |
| Johnson | 12 | 7 | 5 | |
| Knox | 52 | 49 | 3 | |
| La Salle | 107 | 48 | 59 | |
| Lawrence | 16 | 7 | 9 | |
| Lee | 40 | 32 | 8 | |
| Livingston | 62 | 30 | 32 | |
| Logan | 27 | 20 | 7 | |
| Marion | 31 | 12 | 19 | |
| Mason | 21 | 9 | 12 | |
| Massac | 28 | 12 | 16 | |
| McDonough | 25 | 13 | 12 | |
| Montgomery | 25 | 13 | 12 | |
| Morgan | 41 | 15 | 26 | |
| Moultrie | 19 | 10 | 9 | |
| Ogle | 65 | 47 | 18 | |
| Perry | 30 | 12 | 18 | |
| Pike | 25 | 10 | 15 | |
| Pope | 3 | 3 | 0 | |
| Pulaski | 15 | 10 | 5 | |
| Putnam | 11 | 6 | 5 | |
| Randolph | 25 | 12 | 13 | |
| Richland | 19 | 7 | 12 | |
| Saline | 47 | 10 | 37 | |
| Schuyler | 10 | 5 | 5 | |
| Scott | 7 | 3 | 4 | |
| Shelby | 31 | 11 | 20 | |
| Stephenson | 70 | 27 | 43 | |
| Union | 15 | 8 | 7 | |
| Wabash | 8 | 3 | 5 | |
| Warren | 21 | 11 | 10 | |
| Washington | 21 | 6 | 15 | |
| Wayne | 21 | 11 | 10 | |
| White | 26 | 7 | 19 | |
| Whiteside | 51 | 24 | 27 | |
| Williamson | 66 | 35 | 31 |
Provides the methodology used in constructing this table and other pertinent information about this table.