Dundrum is a town in Dublin, Ireland. It is located in the south-west of the city, in the administrative area of Dún Laoghaire–Rathdown. The area is also known as South Dublin. Dundrum is a prosperous and affluent suburb, and is one of the most expensive places to live in Ireland. The town is home to a number of schools, churches, parks and recreation facilities. It is also home to a number of businesses and shopping centres.