St. Mary's Bank Categories BANK 50 Nashua Rd #100 Londonderry NH 03053 (603) 629-1670 Visit Website About Us On November 24, 1908 we officially opened our doors in Manchester, New Hampshire as “La Caisse Populaire, Ste-Marie” (The People’s Bank) and became the first credit union in the nation. Share × Print Email Facebook Twitter LinkedIn Tell a Friend ×