I n this article we define, validate, and propose a construct of entrepreneurial intensity, or the degree of entrepreneurship in firms. First, in defining the construct, we explore theoretical differences between entrepreneurial intensity and orientation in order to distinguish it. Second, we empirically validate a measure of entrepreneurial intensity using data based on a sample of 563 entrepreneurs. Third, we propose avenues for research on how entrepreneurial intensity distinguishes entrepreneurs and entrepreneurial action. Finally, we detail theoretical implications of using entrepreneurial intensity as an antecedent and outcome.