UCO Bank, formerly United Commercial Bank , is an Indian public sector bank, established in 1943 in Kolkata. During FY 2020–21, its total business was ₹ 3.24 lakh crore. Based on 2020 data, it is ranked 80 on the Fortune India 500 list. UCO Bank was ranked 1948 in Forbes Global 2000 list of year 2018. As of 30 March 2017 the bank had 4,000 plus service units 49 zonal offices spread all over India. It also has two overseas branches in Singapore and Hong Kong. UCO Bank's headquarters is on BTM Sarani, Kolkata.

The Bank's Regional presence includes 3,078 branches and 2,564 ATMs. The near future will see a growth in the number of ATMs and Branches As on 31 March 2021, government share-holding in the bank was 94.44%. For FY 2020-21, it registered ₹167 crore net profit. Branch expansion started at a fast pace, particularly in rural areas, and the bank achieved several unique distinctions in Priority Sector lending and other social uplift activities. To keep pace with the developing scenario and expansion of business, the Bank undertook an exercise in organizational restructuring in the year 1972. This resulted in more functional specialization, decentralization of administration and emphasis on the development of personnel skills and attitudes. Side by side, whole-hearted commitment to the government's poverty alleviation programs continued and the convenorship of the State Level Bankers' Committee (SLBC) was entrusted to the Bank for Odisha and Himachal Pradesh in 1983.

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