- Afribank Nigeria – One of the largest banks in Nigeria in terms of assets and one of the most diversified financial conglomerate in the country.
- Barclays (Nigeria) offers international banking services in Lagos. Barclays in Nigeria does not provide a local banking service from this office.
- Citibank Nigeria has been operating in Nigeria since 1984. The Bank provides a broad array of financial services to corporate and commercial customers, financial institutions and public sector organizations.
- Diamond Bank – A universal bank, offering a full range of financial products and services to retail and corporate customers. As of December 2010, it had approximately N600 billion in assets.
- Equitorial Trust Bank (ETB) – A commercial bank in Nigeria, founded in 1990. In 2011, it was acquired by Sterling Bank Plc. The both institutions will serve customers through 187 branches nationwide.
- Ecobank Nigeria – A commercial bank in Nigeria, established in 1986. It is a subsidiary of Ecobank Transnational Inc., a leading pan-African banking group with over 1150 branches across the continent.
- Fidelity Bank – One the top 10 largest banks in Nigeria, established in 1988. The current Fidelity Bank is a result of the merger with the former FSB International Bank and Manny Bank in December 2005. As at 31 March 2011, the Bank had total assets of N475.97 billion and customer deposits of N313.25 billion.
- First Bank of Nigeria (FBN) – The largest bank operating in Nigeria with total assets of N3,094 billion (US$19.00 billion) as of June 30, 2012. FirstBank was founded in 1894 and is headquartered in Lagos.
- First City Monument Bank (FCMB) – A universal bank with an emerging retail banking business, headquartered in Lagos, Nigeria. FCMB is the flagship of the First City Group, one of the leading financial institutions in Nigeria. As of September 30, 2011, FCMB had total assets of N598.99 billion.
- Guaranty Trust Bank (GTBank) – GTBank is the third largest bank in Nigeria. With over 2,500 employees, it operates through a network of more than 170 offices in Nigeria with several bank and non-bank subsidiaries spread across Anglophone West Africa and the UK. The bank currently has total assets of over 1 trillion Naira and shareholders’ funds of more than 190 Billion Naira.
- Intercontinental Bank – One of Africa's strongest financial institutions. From a share capital N12 million in 1989, Intercontinental Bank's Shareholders' Fund is now more than 200 billion Naira. As at February 2008, the Bank had total assets of 1.7 trillion Naira, while total deposit liabilities stood at 1.08 trillion Naira.
- Indo-Nigerian Merchant Bank Ltd – This bank has ceased to exist.
- Oceanic Bank – With about 400 offices in Nigeria, Cameroun, the Gambia and Sao Tome & Principe, it is one of the most recognized financial services brands in West Africa. The company was established in 1990 and the Bank’s shares were listed on the Nigerian Stock Exchange in 2004. As of 31 March 2011, the Bank had total assets of N991.7 billion.
- Stanbic IBTC Bank – A part of the Standard Bank Group, based in Johannesburg, South Africa. As of December 2011, Stanbic had over N554 billion (US$3.4 billion) in total assets.
- Sterling Bank Plc – A major financial services provider providing a wide range of banking services to individuals, businesses, non-profit organizations and government agencies.
- Union Bank of Nigeria – Established in 1917, UBN is one of the leading financial institutions in sub-Sahara Africa with total assets of about US$9.0 billion (2009). It operates more than 405 branches throughout Nigeria
- United Bank for Africa (UBA) – UBA is one of Africa’s leading financial institutions offering universal banking to over 7.2 million customers through a network of almost 800 branches in 17 African countries.
- Wema Bank – A universal bank in Nigeria with total assets of 271 billion Naira and about 2,000 staff at the end of December 2011. It was founded in 1945 and is based in Lagos.
- Zenith Bank – One of the largest banks in Nigeria and West Africa with total assets of N2.02 trillion at the end of March 2011. The bank was established in May 1990 and started operations in July same year as a commercial bank.