EXHIBIT 21 Subsidiaries of the Registrant Parent - ------ FirstBank NW Corp. Percentage Jurisdiction or Subsidiaries of Ownership State of Incorporation - ------------ ------------ ---------------------- FirstBank Northwest (1), 100% Washington with its subsidiaries: Tri-Star Financial Corporation (1) 100% Idaho Pioneer Development Corporation (2) 100% Oregon The operations of the Registrant's subsidiaries are included in the Registrant's consolidated financial statements. (1) These subsidiaries were acquired by the parent effective July 1, 1997. (2) This subsidiary was acquired by the parent effective October 31, 2003.