SEATTLE, WASHINGTON – Washington Federal, Inc. (NASDAQ-WFSL), parent company of Washington Federal, today announced its acquisition of certain assets and liabilities, including most of the loans and deposits, of Western National Bank (WNB), headquartered in Phoenix Arizona.  As of June 30, 2011, WNB reported total assets of $174 million and total deposits of $146 million.   WNB operated three offices in Maricopa County in Arizona.