H
| Haarlem, Nederlands | Bavo |
| Haberdashers | Louis IX, Michael the Archangel |
| Hemorrhage | Lucy |
| Hemorrhoid sufferers | Fiacre |
| Hail | Magnus of Fussen |
| Hainault, Belgium | Waltude |
| Hairdressers | Martin de Porres, Cosmas and Damian |
| Haiti | Our Lady of Perpetual Help |
| Hangovers | Bibiana |
| Happy meetings | Raphael the Archangel |
| Harness makers | Assumption of the Blessed Virgin, Eligius (Eloi) |
| Harvesters | Peter the Apostle |
| Harvests | Anthony of Padua, Florian, Jodocus, Medard of Noyon, Walburga |
| Hatmakers, hatters, milliners | Barbara, Clement I, James the Lesser, Apostle, Michael the Archangel, Severus of Avranches |
| Hawaii, USA | Mary, Star of the Sea |
| Haymakers | Gervase, Protase |
| Head injuries | John Licci |
| Headaches | Teresa of Avila, Denis, Bishop of Paris |
| Healers | Bridgid of Ireland |
| Health | Infant Jesus of Prague |
| Health inspectors | Raphael the Archangel |
| Health service, public | Martin de Porres |
| Heart patients | John of God |
| Heart patients | John of God |
| Hermits, recluses | Anthony the Abbott, Giles |
| Hernia | Alban of Mainz, Cosmas and Damian, Drogo, Gummarus |
| Hernia sufferers | Cathal |
| Herpes | George |
| High command, Spanish | Immaculate Conception of Mary |
| Highways, motorways | John the Baptist |
| Hirnant, Powys, Wales | Ellidius |
| Hoarseness | Bernardine of Siena |
| Hogs, pigs, swine | Anthony the Abbott |
| Holland | Willibrord |
| Holland, the Nederlands, the Netherlands | Bavo, Plechelm, Willibrord |
| Holy death | Andrew Avellino, Christopher, Joseph, Michael the Archangel, Ursula |
| Holy Name Society; Confraternity of the Most Holy Name of God and Jesus | John of Vercelli |
| Homeless people, Hoboes, tramps | Benedict Joseph Labre, Edwin, Elizabeth of Hungary, Lufthild, Margaret of Cortona |
| Homemakers, Housewives, Housekeepers | Anne, Martha, Monica, Zita |
| Honduras | Our Lady of Suyapa, Our Lady of Suyapa |
| Hopeless (or desperate) cases | Jude, Rita of Cascia, Gregory the Wonderworker |
| Horned animals | Guy of Anderlecht |
| Horse men, riders, equestrians | Anne, George, James the Greater, Martin of Tours |
| Horse-riders | Martin of Tours |
| Horses | Eligius (Eloi), Martin of Tours, Hippolytus |
| Horticulturalists | Adam, Fiacre |
| Hosiers | Fiacre |
| Hospital administrators | Basil the Great, Frances Xavier Cabrini |
| Hospital public relations | Paul, Apostle |
| Hospital workers | Camillus de Lellis, John of God, Jude Thaddeus, Vincent Ferrer |
| Hospitality, hospitallers | Julian the Hospitaller, Meinrad |
| Hospitals | Camillus de Lellis, John of God, Vincent de Paul |
| Hoteliers | Gentian |
| Hoteliers (Italian) | Martha |
| Hotelkeepers | Amand |
| House hunters or sellers | Joseph |
| House hunting | Joseph |
| Housewives | Anne (Mother of Mary), Martha |
| Human race, people | Mary, Mother of God |
| Hungary | Stephen, Mary, Great Queen of Hungary |
| Hunters | Hubert, Eustachius |
| Hydrophobia, or rabies | Hubert, Ubald |