| Charles Merton Merrill | |
| Office: | Senior Judge of the United States Court of Appeals for the Ninth Circuit |
| Term Start: | October 8, 1974 |
| Term End: | March 29, 1996 |
| Office1: | Judge of the United States Court of Appeals for the Ninth Circuit |
| Term Start1: | September 21, 1959 |
| Term End1: | October 8, 1974 |
| Appointer1: | Dwight D. Eisenhower |
| Predecessor1: | William Healy |
| Successor1: | Anthony Kennedy |
| Birth Name: | Charles Merton Merrill |
| Birth Date: | 11 December 1907 |
| Birth Place: | Honolulu, Territory of Hawaii |
| Death Place: | San Francisco, California, U.S. |
| Education: | University of California, Berkeley (BA) Harvard University (LLB) |
Charles Merton Merrill (December 11, 1907 – March 29, 1996) was a United States circuit judge of the United States Court of Appeals for the Ninth Circuit.
Born in Honolulu, Territory of Hawaii, Merrill received an Artium Baccalaureus degree from the University of California, Berkeley in 1928 and a Bachelor of Laws from Harvard Law School in 1931. He was in private practice in Reno, Nevada from 1931 to 1950. He became a justice of the Nevada Supreme Court from 1951 to 1959, serving as chief justice from 1955 to 1956, and in 1959.
On August 27, 1959, Merrill was nominated by President Dwight D. Eisenhower to a seat on the United States Court of Appeals for the Ninth Circuit vacated by Judge William Healy. Merrill was confirmed by the United States Senate on September 14, 1959, and received his commission on September 21, 1959. He assumed senior status on October 8, 1974, serving in that capacity until his death on March 29, 1996, in San Francisco, California.