John C. Lehr
 John Camillus Lehr (November 18 1878 – February 17 1958) was a politician from the U.S. state of Michigan. Lehr was born in Monroe Michigan and attended St. Mary's private school and graduated from Monroe High School in 1897. He graduated from the law department of the University of Michigan at Ann Arbor in 1900. He was admitted to the bar the same year and commenced practice in Monroe. He moved to Port Huron in 1905 and continued the practice of law there.