| William Bernau | |
| State House1: | Iowa |
| District1: | 62nd |
| Term Start1: | January 11, 1993 |
| Term End1: | January 10, 1999 |
| Predecessor1: | Philip Wise |
| Successor1: | Dennis Parmenter |
| State House2: | Iowa |
| District2: | 73rd |
| Term Start2: | January 14, 1991 |
| Term End2: | January 10, 1993 |
| Successor2: | Betty Grundberg |
| Predecessor2: | Ralph Rosenberg |
| Birth Date: | 11 November 1964 |
| Birth Place: | Charles City, Iowa, United States |
| Party: | Democrat |
| Spouse: | Judy Eike |
| Children: | Two |
William Bernau (born November 11, 1964) is a former American politician.
William Bernau was born in Charles City, Iowa to parents Gary and Patricia Bernau on November 11, 1964. Upon graduating from Charles City High School, Bernau enrolled at North Iowa Area Community College, and subsequently earned a Bachelor of Science degree in public service and administration from Iowa State University in 1987. He worked as a political consultant. In 1990, Bernau won his first term as a member of the Iowa House of Representatives and was seated as the legislator from District 73. He won reelection thrice thereafter, all from District 62.[1]