AJAYI, Micheal AdebayoNAGERI, Ibraheem K.ABOGUN, SegunABDULMUMIN, B. Ayoola2021-09-172021-09-172017https://uilspace.unilorin.edu.ng/handle/20.500.12484/6373Ability of banks to manage risk and make better use of informational disproportion between borrowers and lenders are the essence of bank’s activities. The efficiency of Nigerian banks has become more compelling bearing in mind the various banking reform and regulations adopted by the Central Bank of Nigeria in recent year. The objective of this study is to evaluate the efficiency of deposit money banks quoted on the Nigerian Stock Exchange during the period of 2011-2015. The study follows the intermediation approach, using the Data Envelopment Analysis. Result indicates that the national licensed banks have better mean efficiency score in 2011, 2012, 2013, the international licensed banks are better in 2014 and the 2015 score shows no significant difference. The best performing bank with international license is GT Bank while Stanbic IBTC and Sterling bank are the joint best practice banks with national license. The inefficiency is attributed to scale inefficiency rather than pure technical inefficiency. Recommendations include that the regulatory authorities should be proactive in their function to cover aspects of loan disbursement, deposit mobilization and investment assets and ensure compliance.enBanksEfficiencyData envelopmentOutputInputArticle