This research addresses the issue of political reaction to immigration in European cities. My thesis approaches the issue at the municipal level because the city is the environment that contains most of the contexts in which citizens exchange political opinions and where they see first hand the effects of demographic change from immigration. My thesis addresses the following questions: how do citizens react politically to immigration? Are all cities the same in their reaction to migrants? Are all migrants the same as far as provoking a political reaction? Which groups make a difference? Where? To answer these questions, I use as dependent variables electoral performance of anti-migrant parties in Italy and Austria, and Best Value Performance Indicator survey results in the UK. I found considerable cross-municipal and cross-regional variation in the political reaction to migrants in my case studies. I also found that migrants of specific ethnic groups and nationalities are more likely to provoke a political reaction in the cities they move in. This finding varies considerably across countries, region, and municipalities.