The aim of this paper is to explore the extent to which personality can explain differences in the creation of social capital. Social capital refers to resources that are embedded in people’s social networks, which can be used to improve one’s life chances. Previous research has put forward a set of three mechanisms that explain how social capital is created. First, social capital is dependent on opportunities for contact with others who are instrumental to one’s goals. Second, social capital depends on how attractive ego is to the alters, because those who have more to offer, receive more in return. Third, social capital depends on relationship qualities, such as trust and reciprocity. While these mechanisms have been used to explain how individuals create social capital, we know very little about why some individuals are better able to leverage these mechanisms in order to create social capital. In this paper, we argue that differences in personality might explain why some people are more successful at creating social capital, namely because their personality structure enables them to seek out more opportunities for contact, makes them more attractive social ties, and increases other people’s willingness to share resources with them. For instance, individuals whose personality is characterized by high extraversion tend to seek out new social contexts, and create larger social networks. Those who are high in agreeableness generously offer their help, which makes them attractive partners for social exchange. And individuals who score high on conscientiousness are considered reliable and trustworthy interaction partners. Based on social psychological research, we derived hypotheses for each of the Big Five personality dimensions. Specifically, we hypothesized that extraversion, openness to experience, agreeableness and conscientiousness are positively linked to social capital, while neuroticism is negatively linked to social capital. We tested these hypotheses using the Social Survey of the Networks of the Dutch (SSND; Volker, Schutjens, & Mollenhorst, 2014), which contains data of 1062 respondents on the Big Five personality measure and social capital as measured by the position generator. We ran multiple regressions with social capital (i.e., number of positions accessed; average, highest and range of accessed prestige) as dependent variable, and the Big Five personality dimensions as independent variables. In all analyses, we controlled for gender, age, education and ethnicity because these variables were previously shown to be related to social capital. The results support our hypotheses by showing that conscientiousness, openness to experience, extraversion, and agreeableness are positively related to social capital, while neuroticism is negatively related to social capital. We discuss the findings of the present study in light of existing structural explanations of differential creation of social capital.