The Ipswich Town player Mark Kennedy (footballer) is from Clonsilla and started his career at St.Mochta's FC.
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Luttrellstown Castle - dating from the early 15th century and once owned by members of the Guinness family, it is now a hotel, with associated golf course, and was thrown into the spotlight when David Beckham and Victoria Adams married there.
In September 2010 services began from Dunboyne to Dublin Docklands after the redevelopment of 7.5 km section of the old Navan railway line which had been closed in 1963 from Dunboyne to Clonsilla on the Maynooth line.