BACKGROUND: There is increased attention on psychological wellbeing as a public health priority. Here, we examine concurrent and prospective associations between social network connections and psychological wellbeing in a community sample of Australian men (n = 528). METHODS: In regressions, using generalised estimating equations (GEEs), we assessed associations between men's social network connections and psychological wellbeing across five annual timepoints. Social network connections were indicated by time spent with friends, close and extended network size, and activities with friends (physical activity, drinking alcohol, helping with a task, and sharing a meal). Psychological wellbeing was indicated by Ryff's scales of environmental mastery and purpose in life. RESULTS: Modelled concurrently, and longitudinally after adjusting for prior psychological wellbeing, time spent with friends and size of close and extended networks were positively associated with environmental mastery and purpose in life. In concurrent analyses, all activities except drinking with friends were positively associated with psychological wellbeing. Activities were not predictive longitudinally. Results did not differ by fatherhood or relationship status. CONCLUSIONS: Given concurrent and future effects of social network connections on men's wellbeing, public health investment in opportunities that improve men's social connectedness are recommended.