Oldtown (Irish: An tSeanbhaile) is a population centre and townland in the civil parish of Clonmethan in Fingal, County Dublin, Ireland.

The term "chapel villages" has been coined for settlements which evolved in association with the growing social and cultural importance of the Catholic Church in Irish society.

The Parliamentary Gazette of Ireland 1843–44 states that the population of Oldtown in 1841 was 156 and 27 houses were located within the village area of 10 acres (40,000 m2).

"Arrayed in green... mounted on a white horse, [she] rode hither and thither upon the field with drawn sword in hand, rallying the pikemen and leading them in successive charges with the utmost fearlessness" (Patrick Archer, Fingal in 1798).

Oldtown was the first town in the State to benefit from the rural electrification scheme run by the Electricity Supply Board (ESB) from 1946 to 1979.

The village core consists of a mix of two-storey nineteenth century stone built dwellings, single-storey cottages and bungalows.

[citation needed] The local Catholic church, Our Lady Queen of Peace, and presbytery are located south of the village core.

[citation needed] Oldtown has a large playing field, close to the centre of the village, which is home to the Wild Geese GAA club.