Many African governments have extended voting rights to nationals living abroad, but little is known about the political behavior of diaspora populations. In the context of Kenya, where the 2010 constitution authorized diaspora voting, we ask whether nationals living abroad are as likely to vote along ethnic lines as their counterparts at home. Using data from public opinion polls prior to the March 2013 presidential election, we compare levels of support for presumed ethnic candidates among Kenyans surveyed in the diaspora and those surveyed in the country. Overall, diaspora respondents were significantly less likely than in-country respondents to support the presumed ethnic candidate from their home province. The results provide preliminary support for our hypothesis that diaspora Africans are less likely to vote along ethnic lines than their in-country counterparts, and thus are less reliable for the construction of ethnic coalitions. More survey data are needed from Kenyans and other Africans living abroad to further examine the relationship between diaspora voting and ethnicity in African politics.