*These data are provisional and may be revised or adjusted in the future.
Cumulative Dead Bird Infections by County - Illinois, 2005
| Adams County | 3 |
| Champaign County | 2 |
| Cook County | 69 |
| Dekalb County | 1 |
| Dupage County | 20 |
| Grundy County | 2 |
| Henry County | 1 |
| Iroquois County | 1 |
| Kane County | 11 |
| Kankakee County | 13 |
| Kendall County | 4 |
| Knox County | 1 |
| La Salle County | 3 |
| Lake County | 12 |
| Lee County | 1 |
| Livingston County | 1 |
| Macon County | 4 |
| Madison County | 3 |
| Mason County | 1 |
| McDonough County | 2 |
| McHenry County | 27 |
| McLean County | 2 |
| Montgomery County | 2 |
| Morgan County | 2 |
| Ogle County | 2 |
| Peoria County | 4 |
| Piatt County | 1 |
| Rock Island County | 4 |
| Saint Clair County | 2 |
| Sangamon County | 2 |
| Stephenson County | 7 |
| Tazewell County | 3 |
| Washington County | 1 |
| Whiteside County | 1 |
| Will County | 2 |
| Winnebago County | 12 |
| Woodford County | 3 |
Cumulative Total Entire State: 232