WICKLOW, a seaport, and county town of co. Wicklow, Ire land, at the mouth of a lagoon which receives the River Vartry and other streams, 28+ m. S. of Dublin by the Great Southern railway. Pop. (1926), 3,027. The harbour can accommodate vessels of 1,5oo tons and has two piers, with quayage. The name shows the town to have been a settlement of the Norsemen.