Background: As societies have become more complicated to manage, it is already unavoidable for governments to evaluate public policies. Moreover, adherence to professional ethics is an important criterion in evaluations. Therefore, the present research sought to provide a model for public policy evaluation based on the aspects of professional ethics. Method: The approach of the present study was mixed (qualitative-quantitative) and in terms of purpose it was applicable research. In the qualitative section, participants included academic experts and governorate experts of Golestan province, 14 of whom were selected by purposive sampling. The research tool was semistructured interviews and coding method was used to analyze the data. In the quantitative part, the statistical population was the managers and experts of the governorate and governorates (630 people) that the sample size was 248 people and the sampling method was random. Data collection tool was a researcher-made questionnaire based on qualitative findings. Friedman statistical test with Spss26 software was used to analyze the data. Results: The results showed that from the experts' point of view, 6 main themes (quality of effective evaluators in policy, ethical nature of policy, how policy is implemented, factors related to economic planning, openness and accountability and attention to structural issues) and 19 components in public policy evaluation model emphasizing the quality of the dimensions of professional ethics in the governorates of the country. Quantitative results showed that the ethical nature of the policy was the most important component of the general policy evaluation model with emphasis on professional ethics (M = 5.23). Conclusion:It can be concluded that the public policy evaluation model with an emphasis on professional ethics has different cultural, economic, social, and professional elements, which for better governance of provincial governments, they must be considered by executive authorities at the country's macro and micro levels.