Cashel and Templemore are the early starters, with their festivities getting underway at noon and 12.30 respectively.
Parades in Nenagh and Carrick on Suir will start at 2 – followed by Cahir Roscrea, Tipp Town at 2.30 and then Clonmel at the later time of 3.15.
For Roscrea this is their 36th annual Saint Patrick's Day event.
Tipp FM will have live coverage from some of the main events today in Nenagh and Clonmel.
