The State Bank of India Officers Association (Bengal Circle) is the sole recognized Trade Union of Officers of State Bank of India. SBIOA(Bengal circle) was formed in the year 1965 as SBI Supervising Staff Association (Bengal Circle), comprising all categories of officers with 1049 members. It was registered on 29th April 1967 under Trade Union Act, 1926. SBIOA(Bengal Circle), which is spread over the states of West Bengal, Sikkim, and Bay Islands, has more than 6000 members working in branches, CPCs, Zonal Offices, and RBOs.