| Birth Date: | 5 April 1868 |
| Birth Place: | Waterloo, Michigan |
| Term: | 1906 |
| Office1: | Judge of the Stutsman County Courts |
| Predecessor1: | Newton C. Young |
| Successor1: | Charles J. Fisk |
| Appointed1: | Elmore Y. Sarles |
| Alma Mater: | University of Michigan Law School |
John Knauf (April 5, 1868 – September 19, 1952) was an American judge who served as a justice of the Supreme Court of North Dakota in 1906. He was first appointed to the court in 1906 after justice Newton C. Young resigned, and he did not win re-election later that year, making his tenure of four and one half months on the court the shortest in North Dakota history. He died in Fargo, North Dakota in 1952 at age 84.
Knauf was born in Waterloo, Michigan, on April 5, 1868. When he was young, his parents died and along with his brothers and sisters he moved to Stutsman County, North Dakota, in 1883. Knauf was educated in the school system of Jamestown, North Dakota. For higher education, he spent one year at Jamestown College and one year at St. John's University in Collegeville, Minnesota, before enrolling at the University of Michigan School of Law where he received a law degree in 1892.[1]
After receiving his law degree, Knauf was admitted to practice law in the state of Michigan. He was admitted to the North Dakota Bar in 1893 and thereafter opened a legal office in Jamestown. While in Jamestown, he served for a time as a Stutsman County judge.[1]
In 1906, a 38-year-old Knauf was appointed to the North Dakota Supreme Court, filling the seat vacated by the retirement of Newton C. Young. Knauf was defeated in the general election to a full term in the seat later that year.[1]
After leaving the Supreme Court, Knauf returned to private legal practice in Jamestown. He died on September 19, 1952, at the age of 84.[1]