| Bill Dieleman | |
| Office: | Member of the Iowa State Senate |
| Term Start: | 1983 |
| Term End: | 1995 |
| Office2: | Member of the Iowa House of Representatives |
| Term2: | 1975–1983 |
| Birth Date: | 19 January 1931 |
| Birth Place: | Oskaloosa, Iowa, US |
| Party: | Democratic |
| Occupation: | life insurance underwriter, newspaper publisher |
William W. Dieleman (born January 19, 1931) was an American politician in the state of Iowa.
Dieleman was born in Oskaloosa, Iowa. He attended Calvin College and the University of Iowa and was a life insurance underwriter and newspaper publisher. He served in the Iowa State Senate from 1983 to 1995, and House of Representatives from 1975 to 1983 as a Democrat.[1]