| Lloyd R. Leith | |
| Birth Date: | 7 December 1902 |
| Birth Place: | San Francisco, California |
| Occupation: | Basketball referee, basketball coach |
Lloyd R. Leith (December 7, 1902 – September 30, 1979) was an American basketball referee and high school coach. The San Francisco, California native officiated 16 NCAA Men's Division I Basketball Championships between 1939 and 1955. He also served as head coach at Balboa High School (1931–36), George Washington High School (1936–42) and Mission High School (1945–72).