Based on a sample of 955 elementary school children in central China, the present study examined family socio-economic status and parent-child relationships in relation to children’s social creativity, as well as the mediating role of personality traits in these associations. Family environment (socio-economic status and parent-child relationships) and personality traits were significantly correlated with social creativity; children openness, conscientiousness, agreeableness and extraversion partly mediated the relationship between family environment and social creativity when controlling for age and sex. These results are important for explaining the roles of the family environment and individual factors in shaping children’s social creativity.