This article posits that individuals can more easily form social connections with people if they are of the same race. If true, the greater the incidence among his neighbours of persons of his race, the more likely an individual is to make neighbourhood social capital connections and the more likely he is to engage in activities which require it. The article tests this idea using an indicator of individual social capital never previously studied: whether the person uses a carpool to get to work. The analysis accounts for fixed differences across neighbourhoods, and a variety of extensions address possible differential racial sorting into neighbourhoods. The evidence strongly supports the article's hypothesis.