Miles de Cogan (fl. 1170–1182) was an Anglo-Norman knight from Glamorgan who played a significant role in the Norman conquest of Ireland under Richard de Clare, 2nd Earl of Pembroke; a man better known to Irish history as Strongbow.
The family took its name from the manor of Cogan, in Glamorgan, Wales, now a suburb of Penarth, 4.5 miles (7.2 km) south west of Cardiff. The Liber Niger Scutarii of 1166 recorded Miles as holding Cogan as two knight's fees, under the overlordship of William Fitz Robert, 2nd Earl of Gloucester (d.1183).
In 1170 Miles was one of the knights who sailed in Strongbow's expedition of conquest to Ireland. He was appointed constable of Dublin Castle. On the invaders having become besieged in the city by the native Irish, Cogan led a sally outside the castle walls and defeated the besiegers, thus the siege was raised due to his distinguished action. In 1177 he was granted, jointly with Robert FitzStephen (d.1183), the Kingdom of Cork, to be held by the feudal tenure of 60 knight's fees.
He married Christiana Paynel, a daughter of Fulk II Paynel (d.1208), feudal baron of Bampton, Devon. His progeny included:
Miles de Cogan was killed in 1182 during an affray in Desmond.
Descendants of collateral lines of this family eventually adopted the name of Goggin, which name is common in Ireland today.