To date, no physical evidence has been found to indicate that there was any form of Roman presence in Wicklow.
Two things indicate that this might be a possibility.
The first is a townland near Avoca by the name of Tigroney, this is translated locally as "The House of the Romans" and the translation has not been refuted to the best of my knowledge.
And the possible presence of Palladius - who I am assured - was not St.Patrick
The Age of Christ, 430.
The second year of Laeghaire.
In this year Pope Celestinus the First sent Palladius to Ireland, to propagate the faith among the Irish, and he landed in the country of Leinster with a company of twelve men. Nathi, son of Garchu, refused to admit him; but, however, he baptized a few persons in Ireland, and three wooden churches were erected by him, namely, Cell Fhine, Teach Na Romhan, and Domhnach Arta. At Cell Fhine he left his books, and a shrine with the relics of Paul and Peter, and many martyrs besides. He left these four in these churches: Augustinus, Benedictus, Silvester, and Solinus. Palladius, on his returning back to Rome (as he did not receive respect in Ireland), contracted a disease in the country of the Cruithnigh, and died thereof.