This paper examines the effect of executive board-level national culture and board nationality diversity on corporate social performance (CSP). The sample constitutes of 130 executive boards of non-financial firms from Germany, France, the Netherlands, Sweden, Switzerland and the UK over the time period 2010-2014. Based on the upper echelon theory and the notion of national culture, board-level national culture is determined across Hofstede’s dimensions of power distance, individualism, masculinity and power distance. In this paper, no evidence is provided of a significant relationship between board-level national culture and the corporate social performance of the firm. In addition, nationality diversity as a double-edged sword could both enhance and hamper CSP. In this research, no significant relationship between board nationality diversity and CSP is found. In conclusion, alterations of the board composition in terms of nationality in order to foster CSP seem unjustified based on the results of this paper.