| Jim Ladwig | |
| State: | Wisconsin |
| State Assembly: | Wisconsin |
| District: | 63rd |
| Term Start: | January 7, 1985 |
| Term End: | January 4, 1993 |
| Predecessor: | John H. Robinson |
| Successor: | Bonnie Ladwig |
| Term Start1: | January 3, 1979 |
| Term End1: | January 3, 1983 |
| Preceded1: | Marcel Dandeneau |
| Succeeded1: | John H. Robinson |
| Term Start2: | 1974 |
| Term End2: | 1978 |
| Birth Date: | 13 April 1938 |
| Birth Place: | Milwaukee, Wisconsin, U.S. |
| Spouse: | Bonnie Ladwig |
| Children: | 3 |
| Party: | Republican |
| Alma Mater: | University of Wisconsin–Madison |
| Allegiance: |  United States |
| Rank: | 1st Lieutenant |
| Serviceyears: | 1962–1964 |
E. James "Jim" Ladwig (born April 13, 1938) is a retired American politician and businessman. He was a member of the Wisconsin State Assembly for twelve years. A Republican, he represented Caledonia, Wisconsin, and northern Racine County.
Ladwig was born on April 13, 1938, in Milwaukee, Wisconsin.[1] He graduated from Riverside University High School and the University of Wisconsin-Madison.[1] Ladwig served in the United States Army, worked as a high school teacher, and later became an investment broker.[1]
Ladwig was first elected to the Assembly in 1978, defeating incumbent Democrat Marcel Dandeneau. Additionally, he was Supervisor of the Town of Caledonia, Wisconsin, from 1971 to 1973 and Member of the Racine County Board of Supervisors from 1974 to 1978.[1]
Ladwig is married to Bonnie Ladwig, who ultimately succeeded him after his retirement from the Wisconsin Assembly. They have three children. Their son Jim was Racine County Executive from 2011 to 2014.[2]