The purpose of this paper is to empirically examine the relationship between individuals’ regional institutional embeddedness and their entrepreneurial behavior. We particularly shed light on how this type of embeddedness influences the intention-behavior link among entrepreneurs, applying the Theory of Planned Behavior: While entrepreneurial intentions constitute the base of the entrepreneurial process, they do not necessarily translate into entrepreneurial action, that is, starting a new venture. We investigate whether the strength of the relationship between individual entrepreneurial intentions and entrepreneurial behavior is moderated by the regional social capital context in which individuals operate. Our results suggest that the intention-behavior link is weakened by regional hierarchy values, and strengthened by regional cultural diversity, regional density of associational activity, and the prevalence of regional interpersonal trust. The empirical evidence signals that regional policymakers should invest resources to develop a regional social capital infrastructure conducive to entrepreneurial behavior.