Tyrrelstown (Irish: Baile an Tirialaigh) is a planned suburban development located 13 km northwest of the city of Dublin in Ireland. The local authority for the area, which forms part of the Dublin 15 postal district, is Fingal County Council. It is also a townland in the civil parish of Mulhuddart.
Tyrrelstown (often incorrectly spelt as Tyrellstown or Tyrrellstown) derives its name from that of the Tyrrell family, which was granted the lands in the parishes of Clonsilla and Mulhuddart in 1178 by Hugh de Lacy, Lord of Meath. Historically Tyrrelstown is part of the barony of Castleknock, which had its focal point at Castleknock Castle; much of the area's history is intertwined with that of Cruiserath, Castleknock, Mulhuddart and other adjacent places. To the south there is Tyrrelstown House, a protected structure dating back to 1720. About 1580 Tyrrelstown was granted to the Bellings family, whose most prominent member was Richard Bellings, one of the leaders of Confederate Ireland.
Located nearby is Damastown Industrial Estate, one of Dublin's largest industrial estates, which includes a large IBM campus employing over 4,000 people. Also in nearby Cruiserath, there are premises for the pharmaceutical corporation Bristol-Myers Squibb; beyond that is Blanchardstown Corporate Park which features offices belonging to PayPal, Ask.Com, and Welocalize, a multinational software localization company.
A new retail area known as Tyrrelstown Town Centre opened on November 24, 2005 and has been created as part of the recent housing developments to cater to the local inhabitants. A 4-star luxury  hotel was opened in 2006. Plans for a large retail park have been postponed. Other local amenities include two national schools (one under the patronage of Educate Together and a second under the patronage of the Catholic Church ), a creche, a Lidl supermarket, a Superquinn supermarket, a newsagent, a pub, an off-licence, a restaurant, several fast food outlets, a pharmacy, two medical centres, a dental practice, a solicitor's office, a coffee shop, and a hairdresser and barber shop.
There is also a local football (soccer) team called Tyrrelstown FC, which currently has 2 senior teams playing in the AUL as well as a schoolboy teams playing in the DDSL. The football club is currently in a rebuilding phase after a fire damaged all of the clubs equipment. See news article about story - http://www.dublinpeople.com/content/view/700/55/
There is also a GAA club. Tyrrelstown GAA play football and hurling up to Under 12 and also field an adult junior football team in AFL Division 10 North County.
Tyrrelstown is served primarily by the regular 40D Dublin Bus route from Dublin City Centre. In addition a 238 service links the area with Blanchardstown shopping centre and Ladyswell.
A new N2 - N3 link road was completed in May 2013 and passes by Tyrrelstown, improving the development linkages to the M2 (Dublin-north east motorway). By road it is accessible via Mulhuddart, Hollystown and Cruiserath.
Tyrrelstown was created by Dublin property company Twinlite and launched in 2001. Other development companies involved include McInerney Construction, Kranok Construction and Merville Homes. Originally the site was zoned for a landfill that was scrapped; the town now hosts over 5,500 inhabitants and is set to expand further. The architects for the development are J. F. O'Connor of Harolds Cross, Dublin
- Placenames Database of Ireland - Tyrrelstown.
- A History of the County Dublin, Francis Elrington Ball
- Tyrrelstown House on National Inventory of Architectural Heritage
- Tyrrelstown Residents Association
- Tyrrelstown Online - The community website
- Tyrrelstown Football Club
- Tyrrelstown Carlton Hotel
- Tyrrelstown Cricket Club