Magheralin (from Irish: Machaire Lainne, meaning "plain of the church") is a village and civil parish in County Down, Northern Ireland.
By Brian Shaw, CC BY-SA 2.0,
Its original name was Lann Rónáin Fhinn, "church of Ronan Finn", a saint from the famous tale Buile Shuibhne (The Madness of Sweeney). The parish church was built in medieval times and its remains form part of the ruined church in the old village graveyard. The post-medieval settlement appears to have developed along the main road and near to the parish church, with an industrial focus to the south, beside the river. The village is grouped around the junction of a number of roads, and has an attractive parish church and several fine planters' houses, such as Blacklion and Drumcro by Newforge Bridge over the River Lagan. There are two village churches dating back to the 1840s and displaying fine architecture and stained glass.