Summary We characterized social networks in weaned heifers housed in groups on pasture and assessed the effects of preweaning social housing on behavior. Proximity-based social networks surrounding feeding, standing, and lying showed limited correlation, suggesting that they captured different aspects of social behavior. Social housing during the preweaning period had minimal effect on centrality measures describing connectedness within the social network, but preweaning pair assignment was correlated with standing and lying network structure for certain groups. Previously pair-housed heifers stood for longer in the morning, but lying and feeding time did not differ between preweaning housing treatments. Our results suggest that previous social housing may have subtle effects on sociality that persist following weaning, but behavior may be more influenced by immediate social context.