Holy Trinity's pastor, the Rev. Robert Henry, read a letter from Cardinal Timothy Dolan during the 5 p.m. Mass, according to the report.
Other parish closings and consolidations are expected to be announced as soon as Sunday.
According to reports, as many as 50 New York Archdiocese parishes are in danger of being closed or consolidated, including locations in Dobbs Ferry, Hastings-On-Hudson, Irvington, Mount Vernon, Port Chester, Sleepy Hollow and Yonkers in addition to Mamaroneck.
For more on the Archdiocese plan for closures and consolidations, click here.
Click here to follow Daily Voice Yonkers and receive free news updates.