| Metropolitan/Nonmetropolitan | County | Total law enforcement employees | Total officers | Total civilians |
|---|---|---|---|---|
| Metropolitan Counties | Bond | 19 | 11 | 8 |
| Boone | 94 | 33 | 61 | |
| Calhoun | 11 | 6 | 5 | |
| Champaign | 152 | 130 | 22 | |
| Clinton | 35 | 16 | 19 | |
| Cook | 6,979 | 2,390 | 4,589 | |
| De Kalb | 96 | 40 | 56 | |
| Du Page | 516 | 395 | 121 | |
| Ford | 23 | 7 | 16 | |
| Grundy | 62 | 30 | 32 | |
| Henry | 74 | 23 | 51 | |
| Jersey | 27 | 14 | 13 | |
| Kane | 293 | 93 | 200 | |
| Kankakee | 204 | 64 | 140 | |
| Kendall | 106 | 50 | 56 | |
| Lake | 468 | 176 | 292 | |
| Macon | 160 | 50 | 110 | |
| Macoupin | 48 | 44 | 4 | |
| Madison | 174 | 82 | 92 | |
| Marshall | 16 | 7 | 9 | |
| McHenry | 379 | 107 | 272 | |
| McLean | 135 | 55 | 80 | |
| Menard | 15 | 8 | 7 | |
| Mercer | 30 | 12 | 18 | |
| Monroe | 35 | 15 | 20 | |
| Peoria | 268 | 64 | 204 | |
| Piatt | 30 | 10 | 20 | |
| Rock Island | 154 | 64 | 90 | |
| Sangamon | 227 | 75 | 152 | |
| Stark | 12 | 4 | 8 | |
| St. Clair | 176 | 162 | 14 | |
| Tazewell | 108 | 41 | 67 | |
| Vermilion | 82 | 31 | 51 | |
| Will | 550 | 255 | 295 | |
| Winnebago | 390 | 109 | 281 | |
| Woodford | 40 | 37 | 3 | |
| Nonmetropolitan Counties | Adams | 68 | 27 | 41 |
| Alexander | 10 | 8 | 2 | |
| Brown | 6 | 5 | 1 | |
| Bureau | 34 | 19 | 15 | |
| Carroll | 23 | 9 | 14 | |
| Cass | 8 | 7 | 1 | |
| Christian | 35 | 17 | 18 | |
| Clark | 17 | 9 | 8 | |
| Clay | 17 | 11 | 6 | |
| Coles | 48 | 24 | 24 | |
| Crawford | 21 | 9 | 12 | |
| Cumberland | 16 | 6 | 10 | |
| De Witt | 38 | 16 | 22 | |
| Douglas | 26 | 10 | 16 | |
| Edgar | 19 | 8 | 11 | |
| Edwards | 10 | 4 | 6 | |
| Effingham | 48 | 20 | 28 | |
| Fayette | 29 | 10 | 19 | |
| Franklin | 45 | 18 | 27 | |
| Fulton | 46 | 19 | 27 | |
| Gallatin | 4 | 4 | 0 | |
| Greene | 14 | 6 | 8 | |
| Hamilton | 7 | 3 | 4 | |
| Hancock | 24 | 9 | 15 | |
| Hardin | 2 | 2 | 0 | |
| Henderson | 14 | 8 | 6 | |
| Iroquois | 30 | 18 | 12 | |
| Jackson | 71 | 25 | 46 | |
| Jasper | 19 | 9 | 10 | |
| Jefferson | 51 | 20 | 31 | |
| Jo Daviess | 37 | 19 | 18 | |
| Johnson | 13 | 7 | 6 | |
| Knox | 54 | 51 | 3 | |
| La Salle | 109 | 46 | 63 | |
| Lawrence | 17 | 8 | 9 | |
| Lee | 41 | 22 | 19 | |
| Livingston | 63 | 30 | 33 | |
| Logan | 27 | 20 | 7 | |
| Marion | 35 | 13 | 22 | |
| Mason | 21 | 9 | 12 | |
| Massac | 29 | 11 | 18 | |
| McDonough | 25 | 13 | 12 | |
| Montgomery | 28 | 14 | 14 | |
| Morgan | 42 | 15 | 27 | |
| Moultrie | 24 | 10 | 14 | |
| Ogle | 59 | 27 | 32 | |
| Perry | 32 | 26 | 6 | |
| Pike | 28 | 12 | 16 | |
| Pope | 3 | 3 | 0 | |
| Pulaski | 16 | 7 | 9 | |
| Putnam | 11 | 7 | 4 | |
| Randolph | 27 | 12 | 15 | |
| Richland | 23 | 7 | 16 | |
| Saline | 48 | 12 | 36 | |
| Schuyler | 8 | 3 | 5 | |
| Scott | 7 | 3 | 4 | |
| Shelby | 24 | 12 | 12 | |
| Stephenson | 70 | 29 | 41 | |
| Union | 16 | 9 | 7 | |
| Wabash | 6 | 4 | 2 | |
| Warren | 21 | 11 | 10 | |
| Washington | 20 | 7 | 13 | |
| Wayne | 24 | 9 | 15 | |
| White | 25 | 7 | 18 | |
| Whiteside | 51 | 24 | 27 | |
| Williamson | 64 | 35 | 29 |
Provides the methodology used in constructing this table and other pertinent information about this table.