Birth localities of spouses from two generations are examined, to assess the extent to which the observed patterns of marital mobility link the spatially separated and kin-structured sub-populations within the ‘shahrestan’ of Nowshahr. The results indicate localised marriages and short range movements from the village of birth in both generations. Temporal increase in the range of movement indicates the breaking down of isolation, thus providing greater possibilities for admixture and genetic homogeneity.