Corporate governance is a central issue in business and economics. However, governance in financial institutions is more complicated than in other fields because of the nature of financial services and instruments. Financial organizations are similar to other businesses in terms of their purposes of establishment, but confidence in management and complex risk structures are more important in financial organizations than in other businesses. In financial institutions, there are various areas in which problems arise that are related to corporate governance, including the agency problem and stakeholder protection. The importance of good governance for sound performance of financial institutions was reconfirmed during the 2008 financial crisis, raising the need to understand the agency problems and the efficiency of various corporate governance mechanisms in mitigating them. International organizations, such as the Organisation for Economic Co-operation and Development, the Basel Committee, the International Finance Corporation, and the International Organization of Securities Commissions, have been working with regulators and policy makers to improve corporate governance practices both in nonfinancial and financial institutions. Corporate governance, especially in financial institutions, is essential in guaranteeing a sound financial system, capital markets, and sustainable economic growth. Governance weaknesses at financial institutions can result in the transmission of problems across the finance sector and the economy. Consequently, the effectiveness of governance mechanisms of financial institutions and capital markets after financial crises had significant importance in a period that witnessed an intensive discussion of corporate governance issues with new regulations and the related academic works.