St. Catharine Church is an active member of the Religious Communities of Glen Rock. One clergy member and two lay persons represent the parish in this group.
All the various houses of worship in the Borough of Glen Rock are represented in this group. The group meets once a month September through June at a local house of worship to pray, consult on current affairs affecting the community and to plan for any upcoming events.
Events that the Religious Communities regularly sponsor are the interfaith service held each year the evening before Thanksgiving and marching in the July 4th parade pushing shopping carts to collect donations of non-perishable food items and monetary donations to support local charities.