St. Mary's – St. Alphonsus Regional Catholic School, previously known as St. Mary's Academy, is a private Roman Catholic elementary and middle school in Glens Falls, New York, serving kindergarten through 8th grade.

Noah's Ark, as it is called, offers the children what they would normally get at any other day care, as well as learning and also a sense of their faith, although it is not as complicated and in depth as it will be as they grow older.

SMSA features a large Great Hall where events are hosted.

SMSA also has a mini-chapel where confession (optional for those of non-Catholic faith), Adoration and other ceremonies are held.

For students with speech disorders or difficulty learning or reading, SMSA offers specialist help.