State Bank of India (lang-hi?????? ????? ????) (SBI) (BSE500112, lseSBID) is the largest banking and financial services company in India, by almost every parameter - revenues, profits, assets, market capitalization etc. The bank traces its ancestry to British India (British Raj), through the Imperial Bank of India, to the founding in 1806 of the Bank of Calcutta, making it the oldest commercial bank in the Indian Subcontinent. The Government of India nationalized the Imperial Bank of India in 1955, with the Reserve Bank of India taking a 60% stake, and renamed it the State Bank of India. In 2008, the Government took over the stake held by the Reserve Bank of India.

SBI provides a range of banking products through its vast network in India and overseas, including products aimed at NRI (Non-resident Indian)s. The State Bank Group, with over 16000 branches, has the largest branch network in India. With an asset base of $260 billion and $195 billion in deposits, it is a regional banking behemoth. It has a market share among Indian commercial banks of about 20% in deposits and advances, and SBI accounts for almost one-fifth of the nations loans.

SBI has tried to reduce over-staffing by computerizing operations and "golden handshake" schemes that led to a flight of its best and brightest managers. These managers took the retirement allowances and then went on to become senior managers in new private sector banks.

The State bank of India is the 29th most reputed company in the world according to Forbes.

State Bank of India is the largest of the Big Four Banks (Big four banks) of India, along with ICICI Bank, Axis Bank and HDFC Bank ? its main competitors.