The Segregation Effect: How Residential Isolation Shapes Ethnic Minority Representation in England

Abstract Extant literature argues that ethnic minority representation in plurality systems will benefit from the presence of sizable co-ethnic populations. I argue that the threshold for election depends not only on a minority population's group size but a district's level of segregation. I show that residential segregation can facilitate the increased representation of ethnic minority populations. Contrary to the prevailing literature, however, I find that increased segregation levels in cities with sizable minority populations decrease the percentage of co-ethnics elected to office. I support this argument with evidence from an original dataset on the local representation outcomes of Muslims in England between 2011 and 2021, which covers 434 district council elections. Using threshold modelling, I introduce the concept of the population threshold, above which increases in segregation level decrease Muslim representation. This article contributes to the electoral geography literature on ethnic minority representation.