This article tests whether the geographic diversity of editorial boards affects the diversity of research papers. Based on a content analysis of 84 journals listed in the Journal Citation Report, we show that diverse editorial boards are more likely to publish more diverse research articles, based on the country of origin of the first author and on where the data were collected. Our findings also indicate a negative association between (a) the impact factor and diversity of the research approach, (b) the journal's affiliation to an academic association and diversity in the first author's country of origin and the country of data collection, and (c) the founding year of the publication and the country of data collection. Finally, the founding year of the publication is explored as a moderator.