Frederick Clark
Frederick or Fred Clark may refer to:
- Frederick Scotson Clark, English organist and composer
- Frederick W. Clark, American engineer and businessman
- F. Ambrose Clark, American equestrian heir
- Patrick Clark (bishop), Canadian Anglican bishop
- Fred Clark, American character actor
- H. Fred Clark, American pediatrician and vaccinologist
- Fred Clark (politician), American member of Wisconsin State Assembly
- Frederick Le Gros Clark (author), British children's author and an expert on malnutrition
- Frederick Le Gros Clark (surgeon), British surgeon