John Forrest Dillon (December 25, 1831 – May 6, 1914) was an American attorney in Iowa and New York, a justice of the Iowa Supreme Court and a United States circuit judge of the United States Circuit Court for the Eighth Circuit. He authored a highly influential treatise on the power of states over municipal governments.

John Forrest Dillon
Born 1831 in Northampton, Montgomery County, NY
Died 1914 in New York, NY
FJC ID: 621
- Gender
- Male
- Race
- White
Prior employment
- Private practice, New York City1882–1914
Storrs professor of law · 1891–1892- Columbia UniversityProfessor of law · 1879–1882
- Iowa Supreme CourtJustice · 1862–1868
- Iowa District Court, Seventh Judicial DistrictJudge · 1858–1862
- Scott County, IowaCounty attorney · 1853–1858
- Private practice, Davenport, Iowa1852–1853
Appointments
1869–1879 · Appointed by Ulysses Grant (Republican)Term ended: Resignation

Education
- University of Iowaba
- Read law1852
- University of IowaM.D. · 1850