Mitchel Troy (Welsh: Llanfihangel Troddi, that is "church of St Michael on the River Trothy") is a village and community in Monmouthshire, south east Wales, in the United Kingdom.

The addition "Mitchel" is thought not to derive from the church's dedication to St Michael, but rather as a variant of the word "much" or "mickle", as also found at Mitcheldean in Gloucestershire, and used to differentiate the village from the nearby manor of Troy Parva.

[2] John de Troye, Lord Chancellor of Ireland (died 1371), was born here early in the fourteenth century.

The cleric and writer Adam of Usk was the rector in 1382–85;[2][4] and the final resident incumbent of Mitchel Troy with Cwmcarvan, Arthur Walter Sneyd (1900-1980), who retired in 1971, is of note because he succeeded in taking both his Bachelor of Arts and Master of Arts degrees at Jesus College, Oxford within two years of retiring.

[6] Troy House, about 1½ miles north east of the church, was largely rebuilt after about 1680, on the site of an earlier building, for the Duke of Beaufort, after the family seat at Raglan Castle had fallen into ruin.