Fort - Fran
- Fort Augustus Abbey
- Fort Wayne
- Fortaleza, Diocese of
- Fortescue, Blessed Adrian
- Fortitude
- Fortunato of Brescia
- Fortunatus
- Fortunatus Hueber
- Forty Hours' Devotion
- Forty Martyrs
- Forum, Ecclesiastical
- Fossano
- Fossombrone
- Fossombrone (Forum Sempronii)
- Fossors
- Foster, John Gray
- Fothad, Saint
- Fouard, Constant
- Foucault, Jean-Bertrand-Léon
- Foulque de Neuilly