*These data are provisional and may be revised or adjusted in the future.
Cumulative Dead Bird Infections by County - Wisconsin, 2003
| Adams County | 6 |
| Ashland County | 1 |
| Barron County | 1 |
| Burnett County | 2 |
| Calumet County | 4 |
| Chippewa County | 5 |
| Columbia County | 1 |
| Dane County | 7 |
| Dodge County | 1 |
| Dunn County | 3 |
| Eau Claire County | 13 |
| Green County | 1 |
| Green Lake County | 1 |
| Iowa County | 1 |
| Kenosha County | 5 |
| La Crosse County | 6 |
| Manitowoc County | 1 |
| Marathon County | 3 |
| Milwaukee County | 2 |
| Monroe County | 2 |
| Oconto County | 1 |
| Oneida County | 2 |
| Outagamie County | 9 |
| Ozaukee County | 3 |
| Pierce County | 2 |
| Portage County | 3 |
| Racine County | 5 |
| Rock County | 5 |
| Sauk County | 3 |
| Sawyer County | 1 |
| Shawano County | 3 |
| Sheboygan County | 4 |
| St. Croix County | 5 |
| Walworth County | 5 |
| Washburn County | 1 |
| Washington County | 1 |
| Waukesha County | 5 |
| Waupaca County | 3 |
| Winnebago County | 8 |
| Wood County | 7 |