Wicklow (Cill Mhantain, "St Mantan's Church"), county town of Wicklow county, lies not far to the south of Dublin at the southern end of a wide curving bay on the Irish Sea.
Here the River Vartry reaches the sea, after opening out into an inland lagoon 2mi/3km long, separated from the sea by a grassy spit of land (now a promenade and
recreational area). The Vikings took advantage of this safe harbor, establishing themselves in the old monastic settlement founded by St Mantan in the fifth century and renaming it Wykinglo.
Wicklow saw significant expansion in 1995 with residential development and economic growth. The completion of the Ashford/Rathnew bypass in 2004 links Wicklow to Dublin, which has created steady growth as a commuter town.