More than a third of complaints by passengers on the Dart are for people taking drugs, drinking, or smoking.
People have been contacting Irish Rail through their text-alert system.
Connolly, Booterstown and Landsdowne Road stations are the worst for antisocial behaviour.
Passengers have been intimated or witnessed on-board fighting while on trains at these stations.
While services in Bray and Portmarnock had the lowest level of complaints.
February was the worst month for antisocial behaviour with an average of around three alerts a day on the Dart.
There have been 121 complaints about people taking drugs and 47 alerts made about passengers not following Covid-19 guidelines.
