Superior recognition of positive emotional facial expressions compared to negative expressions is well established. However, it is unclear whether this superiority effect differs between non-parents and parents, for whom emotion perception (EP) is an indispensable skill. Although EP has been shown to be modulated by the neuropeptide oxytocin, a central factor in the development of parental care, very little research has addressed the relationship between EP skills, the transition to parenthood, and plasma oxytocin levels. In the present study, we assessed EP abilities with a test battery and measured plasma oxytocin in 77 non-parent and 79 parent couples and applied structural equation modelling to the data. The results showed increased happiness perception abilities in both parents and individuals with elevated oxytocin levels. Furthermore, non-parents showed superior abilities to recognise anger expressions. No significant associations were found regarding the perception of other basic emotion categories or with a general EP factor. The findings are consistent with previous research indicating that elevated oxytocin levels are associated with enhanced EP abilities. They also extend the existing literature by demonstrating that mothers and fathers, regardless of their oxytocin levels, exhibit increased EP superiority.