| Honorific Prefix: | Saint |
| Irchard | |
| Birth Place: | Kincardine O'Neil, Aberdeenshire, Scotland |
| Residence: | Glenmoriston |
| Feast Day: | 24 August |
Saint Irchard (or Erchard, Erthad, Merchard, Yarcard, Yrchard) was a Scottish missionary and bishop.
According to Dom Michael Barrett (1848-1924), a monk of the Order of Saint Benedict at St. Benedict's Abbey, Fort Augustus, Scotland, in his The Calendar of Scottish Saints (1919),
The hagiographer Alban Butler mentions the bishop briefly in his The Lives of the Primitive Fathers, Martyrs, and Other Principal Saints,
The local historian William Mackay (1848–1928) wrote in his Urquhart and Glenmoriston: Olden Times in a Highland Parish (1893),