Description BEO Bancorp wants to be the bank of choice for rural Oregonians. BEO, which is the holding company for Bank of Eastern Oregon, has about a dozen offices in north central Oregon; it is the state's largest agricultural bank. BEO serves area consumers and businesses, offering standard deposit products such as checking and savings accounts, and lending products including mortgages and commercial loans. Through BEO Financial Services, the company offers customers investment and insurance products. BEO Bancorp began in 1945 as the Gilliam County Bank, Arlington.