Acts of xenophobia are a persistent feature of life in South Africa. Daily animosity often spills over into violence against both locals and mostly migrants and their economic enterprises. One argument is that xenophobia has characterized post-apartheid South Africa partly due to increased migration flows. Can migration cause xenophobia? Using data from Xenowatch Reports, we examine the impact of migration flows from Zimbabwe on the onset and persistence of acts of collective violence targeted at foreign nationals’ lives and their foreign-owned businesses in South Africa. Results show that increased migration flows from Zimbabwe into South Africa leads to ethnic polarization, cultural diversity, and intolerance by residents toward immigrants. The variable migrants has a positive but statistically insignificant effect on xenophobia. However, migration can impact xenophobia through inducing ethnic fractionalization, cultural diversity and ethnic polarization, intolerance, and hostility with the coefficients of ethnic fractionalization and cultural diversity being positive and statistically significant and supporting the hypothesis that more migration flows from Zimbabwe lead to more xenophobic attacks in South Africa. These findings aid our understanding of the economic consequences of xenophobia. JEL codes: Q15, Q32, Q54