Robert James Jonker (born March 9, 1960) is a United States district judge for the Western District of Michigan, where he served as chief judge from 2015 to 2022.

Robert James Jonker
Michigan Western District Court
Chief Judge — U.S. District Court for the Western District of Michigan
Born 1960 in Holland, MI
FJC ID: 3152
Career output and lasting influence
Opinions attributed per year · peak 2/year
Later decisions citing those opinions, per year · peak 8/year
Michigan Western District Court · 2007–
Both charts share the same year axis. Opinion counts include only opinions in our corpus attributed to this judge so far — a year at zero can mean an attribution gap, not judicial silence. Influence typically outlasts the career: citations keep climbing after the last opinion.
- Gender
- Male
- Race
- White
Prior employment
- Private practice, Grand Rapids, Michigan1987–2007
Law clerk , Hon. John F. Feikens · 1985–1987
Appointments
2007–present · Appointed by George W. Bush (Republican)
Education
J.D. · 1985- Calvin CollegeB.A. · 1982