Ill. Admin. Code tit. 35, § 391.APPENDIX C
| COUNTY | CORN | WHEAT | SOYBEANS | HAY (dry) |
| Adams | 105 | 45 | 34 | 2.9 |
| Alexander | 86 | 37 | 28 | 2.0 |
| Bond | 92 | 45 | 30 | 2.9 |
| Boone | 121 | 50 | 38 | 3.7 |
| Brown | 113 | 42 | 32 | 2.8 |
| Bureau | 123 | 51 | 41 | 3.5 |
| Calhoun | 101 | 44 | 33 | 3.2 |
| Carroll | 121 | 45 | 38 | 3.8 |
| Cass | 120 | 41 | 37 | 3.1 |
| Champaign | 123 | 54 | 38 | 3.3 |
| Christian | 125 | 49 | 39 | 2.9 |
| Clark | 111 | 43 | 36 | 2.7 |
| Clay | 83 | 40 | 28 | 2.2 |
| Clinton | 88 | 43 | 30 | 3.4 |
| Coles | 119 | 47 | 39 | 3.1 |
| Cook | 103 | 45 | 31 | 2.9 |
| Crawford | 105 | 42 | 33 | 2.4 |
| Cumberland | 109 | 45 | 35 | 2.5 |
| DeKalb | 132 | 53 | 40 | 3.6 |
| DeWitt | 115 | 48 | 38 | 3.2 |
| Douglas | 116 | 52 | 40 | 3.2 |
| DuPage | 114 | 47 | 35 | 2.9 |
| Edgar | 115 | 50 | 38 | 2.9 |
| Edwards | 91 | 43 | 30 | 2.0 |
| Effingham | 106 | 48 | 33 | 2.6 |
| Fayette | 93 | 44 | 29 | 2.5 |
| Ford | 108 | 46 | 37 | 3.3 |
| Franklin | 72 | 40 | 23 | 2.2 |
| Fulton | 107 | 41 | 36 | 2.9 |
| Gallatin | 91 | 42 | 29 | 2.1 |
| Greene | 105 | 48 | 37 | 3.2 |
| Grundy | 116 | 43 | 37 | 3.3 |
| Hamilton | 77 | 43 | 25 | 2.1 |
| Hancock | 116 | 43 | 36 | 2.9 |
| Hardin | 70 | 37 | 25 | 2.0 |
| Henderson | 125 | 41 | 38 | 3.3 |
| Henry | 123 | 49 | 41 | 3.7 |
| Iroquois | 109 | 50 | 36 | 3.6 |
| Jackson | 78 | 38 | 28 | 2.5 |
| Jasper | 106 | 45 | 34 | 2.6 |
| Jefferson | 79 | 41 | 25 | 2.1 |
| COUNTY | CORN | WHEAT | SOYBEANS | HAY (dry) |
| Jersey | 107 | 49 | 34 | 3.1 |
| Jo Daviess | 115 | 49 | 37 | 3.7 |
| Johnson | 76 | 36 | 23 | 2.0 |
| Kane | 128 | 53 | 39 | 3.4 |
| Kankakee | 112 | 47 | 37 | 3.1 |
| Kendall | 119 | 48 | 37 | 3.2 |
| Knox | 120 | 44 | 42 | 3.4 |
| Lake | 101 | 43 | 31 | 3.2 |
| LaSalle | 123 | 48 | 40 | 3.5 |
| Lawrence | 94 | 42 | 32 | 2.3 |
| Lee | 125 | 51 | 39 | 3.7 |
| Livingston | 114 | 47 | 38 | 3.5 |
| Logan | 114 | 49 | 39 | 3.2 |
| McDonough | 121 | 44 | 40 | 3.2 |
| McHenry | 118 | 49 | 36 | 3.5 |
| McLean | 119 | 50 | 40 | 3.4 |
| Macon | 125 | 53 | 39 | 3.2 |
| Macoupin | 114 | 51 | 35 | 3.0 |
| Madison | 105 | 46 | 34 | 3.0 |
| Marion | 85 | 43 | 29 | 2.3 |
| Marshall | 113 | 43 | 39 | 3.4 |
| Mason | 101 | 41 | 36 | 2.9 |
| Massac | 80 | 37 | 25 | 2.0 |
| Menard | 117 | 46 | 40 | 3.2 |
| Mercer | 123 | 50 | 41 | 3.5 |
| Monroe | 100 | 47 | 34 | 3.2 |
| Montgomery | 117 | 49 | 35 | 2.9 |
| Morgan | 129 | 51 | 41 | 3.2 |
| Moultrie | 128 | 52 | 40 | 3.2 |
| Ogle | 122 | 51 | 40 | 3.8 |
| Peoria | 113 | 46 | 39 | 3.2 |
| Perry | 75 | 39 | 28 | 2.5 |
| Piatt | 123 | 54 | 39 | 3.2 |
| Pike | 104 | 44 | 34 | 3.1 |
| Pope | 71 | 36 | 24 | 1.9 |
| Pulaski | 81 | 39 | 28 | 2.2 |
| Putnam | 116 | 44 | 40 | 3.4 |
| Randolph | 85 | 41 | 31 | 2.9 |
| Richland | 92 | 43 | 30 | 2.3 |
| Rock Island | 121 | 46 | 39 | 3.6 |
| St. Clair | 101 | 49 | 34 | 2.9 |
| Saline | 75 | 40 | 24 | 2.1 |
| Sangamon | 128 | 50 | 41 | 3.2 |
| Schuyler | 106 | 42 | 34 | 2.8 |
| COUNTY | CORN | WHEAT | SOYBEANS | HAY (dry) |
| Scott | 114 | 46 | 36 | 3.2 |
| Shelby | 118 | 49 | 36 | 3.0 |
| Stark | 123 | 47 | 42 | 3.3 |
| Stephenson | 118 | 50 | 38 | 3.9 |
| Tazewell | 114 | 46 | 40 | 3.3 |
| Union | 82 | 38 | 27 | 2.1 |
| Vermilion | 118 | 50 | 37 | 3.2 |
| Wabash | 96 | 42 | 31 | 2.1 |
| Warren | 128 | 44 | 42 | 3.2 |
| Washington | 83 | 45 | 29 | 2.9 |
| Wayne | 83 | 40 | 26 | 1.9 |
| White | 83 | 43 | 27 | 2.2 |
| Whiteside | 122 | 48 | 40 | 3.8 |
| Will | 108 | 49 | 34 | 3.2 |
| Williamson | 71 | 37 | 23 | 2.1 |
| Winnebago | 116 | 47 | 36 | 3.7 |
| Woodford | 118 | 45 | 41 | 3.3 |
| Illinois (State) | 115 | 45 | 36 | 3.1 |
Note that all crop yields are expressed in bushels per acre except for hay which is expressed in tons/acre.