Marlay Park is an 86 hectares suburban public park located in Rathfarnham in Dún Laoghaire–Rathdown, Ireland. Lying about nine kilometres from Dublin city centre, the parkland comprises woodlands, ponds and walks. Recreational spaces include a nine-hole, par-three golf course, tennis courts, six soccer pitches, five GAA pitches, a cricket pitch,a dog park, two children's playgrounds and a miniature railway run by the Dublin Society of Model and Experimental Engineers. There is also a craft courtyard with home craft shops and a coffee shop.

Rathfarnham is a southside suburb of Dublin, Ireland in County Dublin. It is south of Terenure, east of Templeogue, and is in the postal districts of Dublin 14 and 16. It is between the local government areas of Dún Laoghaire–Rathdown and South Dublin.