European societies, including Germany, face challenges in integrating immigrant populations into the political process. Despite comprising 14.6% of Germany’s population in 2022, immigrants from non-EU countries lack voting rights in local elections, except through integration councils. These councils have very limited political powers and integration council elections have low voter turnout. This study examines knowledge of and attitudes toward integration councils, as well as public attitudes toward extending non-citizen voting rights in local elections. To do so, we use a random sample from official registers of the urban population of ten German cities, including an oversample of foreign-born populations. Focusing on the role of classic and migration-specific individual-level predictors, as well as regional variations in the institutional setup of integration councils and local political culture, our empirical results indicate that knowledge that integration councils exist is low, especially among non-nationals from non-EU countries. While people generally appreciate that these councils exist, we find individual and group-specific differences in support of expanding the powers and non-citizen suffrage that are mainly explained by general beliefs about immigration and solidarity. To further explore public opinion on this specific form of minority representation, we will conduct a conjoint experiment that varies institutional features (e.g., powers, composition) of integration councils. The results will provide insights into which aspects strengthen the social acceptance of bodies that facilitate ethnic minority representation.