Empathy (or sharing another's emotion) and theory of mind (ToM: the understanding that behavior is guided by true and false beliefs) are cornerstones of human social life and relationships. In contrast to ToM, there has been little study of empathy's development, especially in deaf children. Two studies of a total of 117 children (52 hearing; 65 deaf children of hearing parents) aged 4-13 years were therefore designed to (a) compare levels of empathy in deaf and hearing children, and (b) explore correlations of ToM with empathy in deaf and hearing groups. Results showed that (a) deaf children scored lower in empathy than their hearing peers and (b) empathy and ToM were significantly correlated for deaf children but not for the hearing. Possible reasons for these divergent developmental patterns were considered, along with implications for future research.