Greater Niagara Federal Credit Union Share: Credit Unions Greater Niagara Federal Credit Union Visit Website 2901 Military Road Niagara Falls, NY 14304-1251 (716) 297-5944 (716) 297-6074 (fax) About About Greater Niagara Federal Credit Union is a not-for-profit financial institution that is owned by its members. Anyone who lives, works, worships, attends school, or volunteers in Niagara County is eligible to join.