| Charles Prentiss Orr | |
| Office: | Judge of the United States District Court for the Western District of Pennsylvania |
| Term Start: | April 8, 1909 |
| Term End: | May 16, 1922 |
| Appointer: | William Howard Taft |
| Predecessor: | Seat established by 35 Stat 656 |
| Successor: | Robert Murray Gibson |
| Birth Name: | Charles Prentiss Orr |
| Birth Date: | 22 February 1858 |
| Birth Place: | Allegheny, Pennsylvania, U.S. |
| Death Place: | Pittsburgh, Pennsylvania, U.S. |
| Education: | Hamilton College (A.B.) |
Charles Prentiss Orr (February 22, 1858 – May 16, 1922) was a United States district judge of the United States District Court for the Western District of Pennsylvania.
Born in Allegheny, Pennsylvania, Orr received an Artium Baccalaureus degree from Hamilton College in 1879 and read law to enter the bar in 1881. He was in private practice in Pittsburgh, Pennsylvania from 1886 to 1909.
On March 25, 1909, Orr was nominated by President William Howard Taft to a new seat on the United States District Court for the Western District of Pennsylvania created by 35 Stat. 656. He was confirmed by the United States Senate on April 8, 1909, and received his commission the same day. Orr served in that capacity until his death on May 16, 1922, at his home in Pittsburgh.[1]