

| Faculties of law | Raymond of Peņafort |
| Fahan, Ireland | Mura McFeredach |
| Falling | Venantius |
| Falsely accused | Raymond Nonnatus |
| Farm labourers (Spain, Canada, Mexico) | Isidore the Farmer |
| Farm workers | Benedict, Abbot |
| Farmers | Isidore the Farmer |
| Farmers, Italian | Benedict, Abbot |
| Fathers | Joseph |
| Ferrara, Italy | George |
| Fervent First Communion | Bl Imelda |
| Fever | Genevieve (Genofeva) |
| Finland | Henry of Finland |
| Fire (danger from) | Agatha, Nicholas of Tolentino |
| Fire fighters | Florian, John of God |
| Fire prevention | Catherine of Siena, Agatha |
| Firemen (Italian) | Barbara |
| First Communicants | Tarcisius |
| Fishermen | Andrew, Apostle, Peter |
| Fleury-sur-Loire | Drogo |
| Fliers | Our Lady of Loreto |
| Flight attendants | Bona |
| Flight crew | Our Lady of Loreto |
| Flood | Gregory the Wonderworker, Florian |
| Florence, Italy | John the Baptist, Zenobius |
| Florentine cheese merchants | Bartholomew the Apostle |
| Florentine salt merchants | Bartholomew the Apostle |
| Florida | Our Lady of La Leche |
| Florists, flower growers | Therese of Lisieux, Rose of Lima, Bl. Rose of Viterbo |
| Flying | Joseph of Cupertino, Elijah |
| Flying, all involved in | Our Lady of Loreto |
| Foresters | John Gualbert |
| Forli, Italy | James Salomone |
| Fosses, Belgium | Foillan |
| Foundlings | Holy Innocents |
| Fragalata, Sicily | Calogerus, Demetrius, Gregory |
| France | Joan of Arc, Laurent (Lawrence), Mary, on feast of her Assumption, Bishop of Paris, Therese of Lisieux |
| Franciscan Lay | Didacus |
| Franciscan laity | Didacus |
| Franciscan tertiaries | Louis |
| French Commissariat | Ambrose of Milan |
| French monarchs | Louis IX |
| Funeral directors | Joseph of Arimathea |
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