Scholars have dedicated significant efforts to understanding the factors that influence the environmental strategy of a firm, in order to mitigate the negative impacts on the ecosystem. Learning more about the factors that encourage environmental behavior allows managers and policy makers to improve action and advance correctly in this direction. Despite this academic interest, the literature regarding family business has undertaken limited attention over the issue. Hence, our paper aims to advance in this line of research, by empirically examining the relationship between government support in family firms and their investment in environmental protection. Specifically, we intend to analyze whether the family nature, and the government financial support, influence their environmental strategy. The empirical analysis is developed with a sample of 1802 manufacturing firms in Spain, using a binary logistic regression to evaluate the existence of dependency relationships between the analyzed variables. The results show this dependency, confirming family nature and government support as significant factors for a proactive environmental strategy, funding the idea that family character positively affects environmental performance in line with the socio-emotional wealth approach, and these differences are greater if the company operates mainly in a local area. Likewise, family firms that receive state direct and indirect funding, invest more in environmental issues to mitigate negative external impacts. The practical implications of the results obtained are especially useful for managers of family businesses as well as for central governments and local institutions as a matter of reflection. To reduce administrative processes and costs for family firms in terms of direct and indirect support is of great importance, as an inadequate process may become a barrier to develop environmental strategies.