The purpose of this study is to examine the relationship between integrity policies and integrity of local governments from the perspective of institutional isomorphism. Local governments are making efforts to improve the integrity through integrity policies. However, since the integrity policies of local governments are implemented according to the comprehensive integrity evaluation by the Anti-Corruption and Civil Rights Commission, it is judged that institutional isomorphism is occurring without reflecting the characteristics or organizational capabilities of the institutions. Institutional isomorphism means that policy activities of all organizations become similar while organizations accept them according to the framework required by the institutional environment. This institutional isomorphism makes it difficult for local governments to improve integrity and create a culture of integrity. Looking at the relationship between integrity policies and integrity of local governments, policies to improve corruption-vulnerable areas reflecting the characteristics of institutions appeared to be correlated, and other policies were found to be insignificant with integrity. It is judged that it will be difficult to expect improvement in the essential integrity of local governments unless they develop and implement integrity policies that can create an integrity climate by reflecting the characteristics of local government.