| Lou Fleischer | |
| Birth Date: | 16 July 1891 |
| Birth Place: | New York City, U.S. |
| Death Place: | Los Angeles, California, U.S. |
| Occupation: | Arranger, composer |
| Years Active: | 1923–1942 |
| Relatives: | Max Fleischer (brother) Dave Fleischer (brother) Richard Fleischer (nephew) Seymour Kneitel (nephew-in-law) Mary Dickson (niece-in-law) |
Lou Fleischer (; July 16, 1891 – November 16, 1985) was an American arranger, composer, and the brother of Max and Dave Fleischer. He was the head of the Fleischer Studios Music Department[1] until the company was reorganized as Famous Studios in 1942. He is thought to have been the voice of J. Wellington Wimpy in I Wanna Be a Lifeguard from the Popeye film series in 1936.
Following his dismissal at the changeover to Famous Studios, Fleischer worked as a Lens Grinder for the World War II effort, and later worked for the Army Signal Corps Film Unit in New York. For a short period in the 1940s he did scoring for George Pal and taught piano while residing in Redondo Beach, California until his retirement in the late 1960s.