- Federico Baraibar y ZumárragaCitizenship: SpainBorn: 1851
- Ferdinand MannlicherCitizenship: Austria–HungaryBorn: January 30, 1848
- Feza GürseyCitizenship: TurkeyBorn: April 7, 1921
- Filip FratevCitizenship: BulgariaBorn: April 16, 1974
- Francesco OrsoniBorn: 1849Occupation: autodidact
- Francis GaudeulBorn: July 11, 1911Occupation: historian
- Frank Elmore RossCitizenship: United StatesBorn: April 2, 1874
- Frank Robert WakeCitizenship: CanadaBorn: 1914
- Frank WilczekCitizenship: United StatesBorn: May 15, 1951
- Franz CumontCitizenship: BelgiumBorn: January 3, 1868
- Franz MertensCitizenship: AustriaBorn: March 20, 1840
- Franz-Joseph Müller von ReichensteinCitizenship: Austrian EmpireBorn: June 1740
- François de LanfranchiCitizenship: FranceBorn: June 23, 1926
- François IcardCitizenship: FranceBorn: January 18, 1875
- François Isaac de RivazCitizenship: FranceBorn: December 19, 1752
- François KugelCitizenship: FranceBorn: 1959
- François OuvièreCitizenship: FranceBorn: June 29, 1807
- François Thureau-DanginCitizenship: FranceBorn: January 3, 1872
- Frederick Sumner BrackettCitizenship: United StatesBorn: August 1896
- Friedrich BlühmelCitizenship: Kingdom of PrussiaBorn: 1777
- Friedrich Burkhard KommerellCitizenship: GermanyBorn: April 12, 1901
- Friedrich JohannsenCitizenship: GermanyBorn: September 17, 1897
- Fritz ZwickyCitizenship: SwitzerlandBorn: February 14, 1898