| Adams County |
16 |
| Antelope County |
8 |
| Arthur County |
21 |
| Blaine County |
2 |
| Boone County |
3 |
| Box Butte County |
15 |
| Boyd County |
6 |
| Brown County |
28 |
| Buffalo County |
27 |
| Burt County |
8 |
| Butler County |
9 |
| Cass County |
10 |
| Cedar County |
9 |
| Chase County |
5 |
| Cherry County |
33 |
| Cheyenne County |
3 |
| Clay County |
36 |
| Colfax County |
12 |
| Cuming County |
11 |
| Custer County |
37 |
| Dakota County |
5 |
| Dawes County |
7 |
| Dawson County |
28 |
| Deuel County |
4 |
| Dixon County |
10 |
|
| Dodge County |
16 |
| Douglas County |
46 |
| Dundy County |
5 |
| Fillmore County |
8 |
| Franklin County |
3 |
| Frontier County |
3 |
| Furnas County |
2 |
| Gage County |
13 |
| Garden County |
8 |
| Garfield County |
8 |
| Gosper County |
3 |
| Grant County |
9 |
| Greeley County |
4 |
| Hall County |
33 |
| Hamilton County |
16 |
| Harlan County |
3 |
| Hayes County |
2 |
| Hitchcock County |
3 |
| Holt County |
43 |
| Hooker County |
5 |
| Howard County |
10 |
| Jefferson County |
3 |
| Johnson County |
2 |
| Kearney County |
7 |
| Keith County |
30 |
|
| Keya Paha County |
4 |
| Kimball County |
2 |
| Knox County |
14 |
| Lancaster County |
20 |
| Lincoln County |
33 |
| Logan County |
13 |
| Loup County |
4 |
| Madison County |
14 |
| McPherson County |
7 |
| Merrick County |
6 |
| Morrill County |
15 |
| Nance County |
3 |
| Nemaha County |
3 |
| Nuckolls County |
11 |
| Otoe County |
5 |
| Pawnee County |
5 |
| Perkins County |
5 |
| Phelps County |
8 |
| Pierce County |
9 |
| Platte County |
15 |
| Polk County |
9 |
| Red Willow County |
9 |
| Richardson County |
7 |
| Rock County |
6 |
| Saline County |
17 |
|
| Sarpy County |
9 |
| Saunders County |
11 |
| Scotts Bluff County |
92 |
| Seward County |
11 |
| Sheridan County |
15 |
| Sherman County |
2 |
| Sioux County |
7 |
| Stanton County |
4 |
| Thayer County |
1 |
| Thomas County |
1 |
| Thurston County |
3 |
| Valley County |
12 |
| Washington County |
13 |
| Wayne County |
7 |
| Webster County |
7 |
| Wheeler County |
6 |
| York County |
9 |
|
These county and county equivalent data data are based on information voluntarily reported by state health officials and federal agenciesto CDC. West Nile Virus (WNV) infection was determined by laboratory testing on animals other than wild birds (such as pets, livestock, and wildlife) with symtoms of WNV infection. Note that the map includes all areas of positive (confirmed or probable) WNV results, but not necessarily all areas with submitted samples or no reports.