FHS may refer to:

Schools United States Falmouth High School, Maine Farmington High School, Utah Fife High School, Fife, Washington Firestone High School, Akron, Ohio Flushing High School, Queens, New York Forks High School, Washington Framingham High School, Massachusetts Franklin High School, several schools Fremd High School, Palatine, Illinois Frenship High School, Wolfforth, Texas Frontier High School, Bakersfield, California Frontier High School, New Matamoras, Ohio Folsom High School, Folsom, California Canada Frank Hurt Secondary School, Surrey, British Columbia Fredericton High School, New Brunswick

Health and medicine Feline hyperesthesia syndrome Fetal hydantoin syndrome Floating–Harbor syndrome

Other uses Fellow of the Horticultural Society Filesystem Hierarchy Standard Hasselt railway station, in Belgium Front handspring Frankfurter Hauptschule