FHL

FHL may refer to:


 * Fachhochschule Lübeck, a German university
 * Familial hemophagocytic lymphohistiocytosis
 * Family History Library, a genealogical research facility in Salt Lake City, Utah, United States
 * Federal Hockey League, an American ice hockey league
 * Federal Hockey League (Canada), a defunct Canadian ice hockey league
 * Flexor hallucis longus muscle
 * Friday Harbor Laboratories, a marine biology field station of the University of Washington