Multiculturalism is an increasingly salient election issue. The growing size of many countries’ ethnic minority populations pushes parties to support multiculturalism, whereas the emergence of far-right parties in many countries pressures them to oppose it. This article examines parties’ positions on multiculturalism in a comparative context. It looks at 19 countries including most of Western Europe, North America, Australia, New Zealand, and Japan. It argues that the influence of ethnic minorities over parties depends on electoral systems, and the strategies mainstream parties adopt in response to the far-right. The article finds that increases in ethnic minorities’ electoral strength lead parties to increase their support of multiculturalism to a greater degree in single-member district electoral systems than in proportional ones. Further, parties co-opt the anti-multicultural positions of far-right parties, and right parties do so more than left parties.