| William A. Kay | |
| Birth Date: | 22 February 1864 |
| Birth Place: | Martell, Wisconsin |
| Death Place: | Madison, Wisconsin |
| Occupation: | Farmer, politician |
| Party: | Republican |
| Office: | Member of the Wisconsin State Assembly |
| Constituency: | Pierce County |
| Term Start1: | 1908 |
| Term End1: | 1912 |
| Term Start2: | 1914 |
| Term End2: | 1916 |
| Term Start3: | 1930 |
| Term End3: | November 27, 1931 |
William A. Kay (February 22, 1864 - November 27, 1931) was an American farmer and politician.
Born in Martell, Wisconsin, Kay was a farmer and served in town government. He served in the Wisconsin State Assembly in 1909, 1911, 1915, and 1931 as a Republican. He died in Madison, Wisconsin while still in office.[1] [2]