| Bill I. Foster | |
| State Senate: | Missouri |
| District: | 25th |
| Term Start: | 2001 |
| Term End: | 2005[1] |
| Birth Date: | December 23, 1946 |
| Nationality: | American |
| Spouse: | Karen (divorced) |
| Party: | Republican |
| Children: | 1 daughter, Karmen (Foster) Carson |
| Alma Mater: | Milwaukee School of Engineering |
| Occupation: | politician, industrial engineer, national guardsman |
Bill I. Foster (born December 23, 1946) is an American politician who served in the Missouri Senate. He served in the National Guard. Foster served as mayor of Poplar Bluff from 1979 until 1980.[2] He previously served in the Missouri House of Representatives between 1993 and 2001.[1]