Using data from a survey of large nonprofits across Canada, this study focuses on the determinants of the range of diversity (defined as the number of different ethnocultural and visible minority groups represented) on boards across the country. The determinants of diversity that the article examines include community, organizational, and general board characteristics as well as board diversity practices. We examine the extent to which these factors are related to an increased range of diversity on the boards. It appears that the diversity of the community that nonprofits operate in and efforts to institutionalize formal diversity-related policies are particularly significant determinants of diversity, although board size and reliance on interorganizational alliances in recruitment of board members also have a small relationship. The implications for theory and practice are examined.