William I. Donnermeyer Sr. (born September 19, 1924) is an American former politician.

He was elected in 1969 to the 68th district of the House of Representatives for the Commonwealth of Kentucky and was first seated in 1970.

Donnermeyer retired in 1994, having served continuously for 25 years.

Donnermeyer is a member of the Bellevue Veterans Club.

He served in the US Navy during World War II.