The parish cemetery is the resting place for the mortal remains of many parishioners including baseball slugger, Dan Brouthers, and Christopher Lynch, a Union soldier who died October 31, 1861 due to wounds incurred at the Battle of Antietam. Father Joseph Gilmore, once a parishioner of St. Mary's, is also buried, there, having become the first priest from New York to die in World War II (at Anzio).