Killiney (Irish: Cill Iníon Léinín, meaning 'Church of the Daughters of Léinín') is an affluent seaside resort and suburb in Dún Laoghaire–Rathdown, Ireland. It lies south of neighbouring Dalkey, east of Ballybrack and Sallynoggin and north of Shankill. The place grew around the 11th century Killiney Church, and became a popular seaside resort in the 19th century. It is part of the Dáil Éireann constituency of Dún Laoghaire.