| 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | |
| Adams | 187.33 | 319.01 | 346.66 | 355.01 | 379.35 | 291.58 |
| Alexander | 52.90 | 150.44 | 173.39 | 235.24 | 266.36 | 301.10 |
| Bond | 117.69 | 89.31 | 127.49 | 149.78 | 110.77 | 199.39 |
| Boone | 352.80 | 289.72 | 259.95 | 200.07 | 267.97 | 262.27 |
| Brown | 248.61 | 218.05 | 262.16 | 175.57 | 313.39 | 298.46 |
| Bureau | 314.83 | 365.35 | 252.96 | 294.37 | 331.85 | 388.58 |
| Calhoun | 99.80 | 38.99 | 96.97 | 38.74 | 57.95 | 193.16 |
| Carroll | 164.90 | 171.22 | 98.69 | 205.15 | 87.31 | 49.89 |
| Cass | 219.76 | 296.41 | 390.94 | 273.42 | 261.51 | 217.93 |
| Champaign | 245.23 | 262.67 | 226.85 | 227.68 | 234.27 | 302.67 |
| Christian | 230.07 | 264.69 | 193.03 | 284.28 | 151.16 | 276.64 |
| Clark | 417.82 | 443.45 | 306.50 | 447.69 | 312.00 | 229.59 |
| Clay | 34.99 | 98.23 | 112.99 | 127.46 | 142.57 | 135.44 |
| Clinton | 86.63 | 80.52 | 99.70 | 113.59 | 111.92 | 111.92 |
| Coles | 428.22 | 324.96 | 126.31 | 148.83 | 127.58 | 172.72 |
| Cook | 480.40 | 533.39 | 570.15 | 587.86 | 596.58 | 622.58 |
| Crawford | 133.94 | 234.58 | 210.19 | 216.10 | 317.78 | 196.72 |
| Cumberland | 189.24 | 271.84 | 108.61 | 100.25 | 18.18 | 190.91 |
| DeKalb | 312.08 | 301.18 | 215.10 | 252.91 | 260.64 | 294.59 |
| DeWitt | 168.19 | 162.45 | 217.27 | 240.72 | 149.09 | 202.77 |
| Douglas | 150.41 | 266.35 | 185.38 | 325.81 | 197.06 | 242.53 |
| DuPage | 201.08 | 207.03 | 202.45 | 195.35 | 198.78 | 238.13 |
| Edgar | 221.56 | 134.53 | 218.19 | 224.46 | 594.28 | 495.23 |
| Edwards | 87.80 | 423.61 | 648.49 | 265.33 | 45.34 | 75.56 |
| Effingham | 200.57 | 254.94 | 170.32 | 242.91 | 182.99 | 197.51 |
| Fayette | 153.03 | 120.57 | 78.59 | 96.72 | 41.33 | 96.45 |
| Ford | 77.69 | 169.70 | 182.76 | 240.16 | 253.32 | 302.58 |
| Franklin | 151.14 | 198.90 | 275.96 | 286.99 | 283.48 | 225.78 |
| Fulton | 250.10 | 307.80 | 191.05 | 151.16 | 128.42 | 176.57 |
| Gallatin | 80.54 | 80.48 | 113.23 | 48.76 | 0.00 | 81.18 |
| Greene | 170.15 | 368.12 | 102.93 | 48.01 | 175.38 | 203.44 |
| Grundy | 348.50 | 277.77 | 240.42 | 184.77 | 285.85 | 198.57 |
| Hamilton* | 106.94 | 83.79 | 119.13 | 60.23 | 143.97 | 12.00 |
| Hancock | 238.77 | 225.43 | 154.91 | 172.30 | 89.05 | 57.62 |
| Hardin | 84.57 | 168.71 | 21.17 | 317.93 | 261.72 | 218.10 |
| Henderson | 12.25 | 99.45 | 49.58 | 50.18 | 38.37 | 102.31 |
| Henry | 422.06 | 352.84 | 257.08 | 324.17 | 288.05 | 403.27 |
| Iroquois | 110.36 | 130.19 | 143.90 | 149.95 | 130.73 | 186.29 |
| Jackson | 393.93 | 397.15 | 362.63 | 308.87 | 385.96 | 410.19 |
| Jasper | 228.36 | 59.92 | 129.30 | 69.86 | 50.61 | 91.09 |
| Jefferson | 283.06 | 370.29 | 354.64 | 598.51 | 562.64 | 653.95 |
| Jersey | 350.29 | 484.12 | 523.63 | 645.71 | 384.48 | 525.90 |
| JoDaviess | 311.92 | 491.52 | 514.98 | 323.29 | 203.59 | 256.71 |
| Johnson | 218.20 | 292.40 | 168.85 | 265.78 | 202.10 | 269.46 |
| Kane | 215.15 | 218.81 | 217.23 | 211.57 | 194.64 | 211.85 |
| Kankakee | 286.88 | 306.03 | 194.32 | 257.47 | 264.00 | 292.42 |
| Kendall | 197.53 | 208.79 | 180.18 | 188.65 | 209.85 | 241.61 |
| Knox | 211.26 | 334.56 | 500.01 | 277.63 | 285.41 | 302.42 |
| Lake | 251.98 | 239.18 | 259.36 | 251.75 | 264.63 | 227.30 |
| LaSalle | 301.61 | 276.71 | 262.86 | 288.62 | 237.92 | 289.31 |
| Lawrence | 211.53 | 510.87 | 457.31 | 703.08 | 572.80 | 396.55 |
| Lee | 300.46 | 331.63 | 257.87 | 271.94 | 333.32 | 333.32 |
| Livingston | 267.21 | 283.47 | 297.09 | 382.79 | 302.65 | 331.11 |
| Logan | 328.10 | 266.77 | 208.37 | 232.00 | 280.51 | 188.11 |
| McDonough | 298.34 | 321.78 | 371.51 | 419.20 | 590.77 | 572.69 |
| McHenry | 145.87 | 162.88 | 158.64 | 188.49 | 162.31 | 133.08 |
| McLean | 283.44 | 269.17 | 286.35 | 249.67 | 301.49 | 324.91 |
| Macon | 332.81 | 427.55 | 398.18 | 355.82 | 383.32 | 329.28 |
| Macoupin | 91.82 | 126.39 | 150.80 | 111.99 | 108.52 | 138.43 |
| Madison | 270.96 | 304.30 | 267.23 | 288.68 | 336.22 | 90.31 |
| Marion | 160.72 | 198.43 | 190.46 | 266.54 | 241.97 | 614.47 |
| Marshall | 153.65 | 222.10 | 235.03 | 143.75 | 92.29 | 373.94 |
| Mason | 81.33 | 75.43 | 81.82 | 114.35 | 103.21 | 166.79 |
| Massac | 283.45 | 449.05 | 470.77 | 423.51 | 733.40 | 322.58 |
| Menard | 95.31 | 86.88 | 164.82 | 141.31 | 214.49 | 293.93 |
| Mercer | 317.53 | 289.56 | 376.67 | 260.17 | 387.23 | 333.61 |
| Monroe | 327.01 | 272.34 | 265.65 | 193.30 | 185.09 | 185.09 |
| Montgomery | 287.81 | 226.91 | 262.80 | 388.21 | 296.37 | 414.92 |
| Morgan | 301.96 | 286.17 | 289.21 | 249.15 | 297.20 | 314.02 |
| Moultrie | 97.46 | 194.61 | 201.07 | 220.54 | 159.91 | 97.34 |
| Ogle | 272.06 | 262.46 | 235.40 | 338.92 | 279.06 | 260.83 |
| Peoria | 222.35 | 394.34 | 437.60 | 470.58 | 570.43 | 468.51 |
| Perry | 114.06 | 92.41 | 224.76 | 254.22 | 179.31 | 223.05 |
| Piatt | 123.07 | 109.58 | 84.86 | 95.92 | 161.79 | 215.72 |
| Pike | 76.13 | 235.47 | 292.16 | 502.95 | 564.13 | 385.99 |
| Pope | 0.00 | 0.00 | 163.36 | 118.74 | 71.70 | 0.00 |
| Pulaski | 292.23 | 623.41 | 345.32 | 353.25 | 237.88 | 312.22 |
| Putnam | 163.75 | 98.04 | 311.58 | 147.69 | 66.61 | 149.88 |
| Randolph | 210.29 | 120.34 | 156.43 | 292.86 | 290.66 | 333.05 |
| Richland | 149.40 | 301.22 | 151.38 | 183.57 | 165.35 | 298.91 |
| Rock Island | 452.81 | 499.57 | 445.77 | 403.23 | 436.48 | 517.13 |
| St. Clair | 214.42 | 281.25 | 275.16 | 365.29 | 369.85 | 260.92 |
| Saline | 160.04 | 110.93 | 137.37 | 141.91 | 164.99 | 439.22 |
| Sangamon | 359.73 | 409.81 | 350.47 | 329.38 | 361.71 | 515.46 |
| Schuyler | 100.01 | 71.47 | 227.21 | 226.21 | 572.74 | 18.60 |
| Scott | 36.34 | 54.61 | 36.88 | 0.00 | 37.20 | 347.28 |
| Shelby | 327.84 | 351.11 | 607.90 | 416.63 | 347.28 | 439.98 |
| Stark | 31.99 | 64.53 | 16.17 | 16.21 | 96.26 | 112.31 |
| Stephenson | 340.38 | 286.25 | 317.92 | 325.24 | 327.09 | 314.43 |
| Tazewell | 380.17 | 350.80 | 264.33 | 243.85 | 314.03 | 317.10 |
| Union | 66.04 | 49.34 | 120.91 | 104.38 | 38.33 | 93.09 |
| Vermillion | 252.32 | 259.57 | 257.72 | 194.31 | 207.47 | 225.77 |
| Wabash | 393.39 | 299.35 | 452.35 | 294.35 | 337.16 | 248.86 |
| Warren | 326.30 | 351.07 | 265.33 | 296.16 | 291.76 | 343.25 |
| Washington | 178.19 | 105.53 | 92.58 | 107.22 | 127.29 | 87.09 |
| Wayne | 199.61 | 460.67 | 404.42 | 357.23 | 186.72 | 168.65 |
| White | 433.53 | 436.77 | 321.92 | 366.40 | 364.77 | 265.29 |
| Whiteside | 192.29 | 238.62 | 228.50 | 255.58 | 270.54 | 290.58 |
| Will | 262.97 | 219.43 | 194.17 | 187.77 | 245.43 | 275.96 |
| Williamson | 77.26 | 99.25 | 64.95 | 77.02 | 81.58 | 80.01 |
| Winnebago | 287.63 | 342.63 | 350.35 | 324.56 | 346.37 | 353.14 |
| Woodford | 163.90 | 181.32 | 178.67 | 178.91 | 153.02 | 163.57 |
| TOTAL | 346.28 | 377.50 | 384.48 | 392.68 | 402.53 | 426.72 |
Notes:
Illinois provides data on four types of drug offenses. Marijuana offenses are violations of the Cannabis Control Act. Controlled Substances Violations concern other drugs, do not include marijuana arrests, and are classified separately. Two other types of drug offenses are violations of the Hypodermic Syringes and Needles Act and the Drug Paraphernalia Act. These violations are not included in these tables. In these tables on drug-related arrests in Illinois, drug offenses include violations of the Controlled Substances Act and the Cannabis Control Act only
Arrest rates are per 100,000 persons.
Source: Illinois State Police and Chicago Police Department