

| Haarlem, Nederlands | Bavo |
| Haemorrhage | Lucy |
| Haemorrhoid sufferers | Fiacre |
| Hail | Magnus of Fussen |
| Hainault, Belgium | Waltude |
| Hairdressers | Martin de Porres, Cosmas and Damian |
| Haiti | Our Lady of Perpetual Help |
| Hawaii, USA | Mary, Star of the Sea |
| Headaches | Teresa of Avila, Denis, Bishop of Paris |
| Health inspectors | Raphael the Archangel |
| Health service, public | Martin de Porres |
| Heart patients | John of God |
| Hernia sufferers | Cathal |
| High command, Spanish | Immaculate Conception of Mary |
| Highways, motorways | John the Baptist |
| Hirnant, Powys, Wales | Ellidius |
| Hoarseness | Bernardine of Siena |
| Holland | Willibrord |
| Holland, the Nederlands, the Netherlands | Bavo, Plechelm, Willibrord |
| Holy Name Society; Confraternity of the Most Holy Name of God and Jesus | John of Vercelli |
| Honduras | Our Lady of Suyapa, Our Lady of Suyapa |
| Hopeless (or desperate) cases | Jude, Rita of Cascia, Gregory the Wonderworker |
| Horse-riders | Martin of Tours |
| Horses | Eligius (Eloi), Martin of Tours, Hippolytus |
| Horticulturalists | Adam, Fiacre |
| Hospitals | Camillus de Lellis, John of God, Vincent de Paul |
| Hoteliers | Gentian |
| Hoteliers (Italian) | Martha |
| Hotelkeepers | Amand |
| House hunting | Joseph |
| Housewives | Anne (Mother of Mary), Martha |
| Hungary | Stephen, Mary, Great Queen of Hungary |
| Hunters | Hubert, Eustachius |
| Hydrophobia, or rabies | Hubert, Ubald |
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