Santander Bank to close four of its 28 CT branches in August FacebookTwitterEmail A Santander Bank branch in West Hartford, Conn. The bank is closing branches in Plainville, Farmington, East Windsor and Waterbury on August 6.Michael Hamad / Hearst Connecticut Media Santander Bank is closing four of its 28 branches in the state, including one in New Haven County, according to a federal agency that charters, regulates and supervises all national banks. Bank officials told the federal Office of the Comptroller of Currency they are closing branches in Plainville, Farmington, East Windsor and Waterbury on August 6. Santander has a branch on East Main Street in Waterbury, in addition to the one at 184 Chase Avenue that is closing.