This article presents the findings of a long-term study of social homogamy in the rural community of Rendalen, Norway, in the eighteenth and nineteenth centuries. Prior to 1870, the occupation of parents was not normally recorded in the Norwegian parish registers. It is therefore difficult to carry out historical studies of social homogamy in Norway over any length of time. The Rendalen database, however, provides this information from several other sources. Structural changes over time, which led to an increase in the number of farm workers, reduced the degree of homogamy among farmers as well as creating a larger marriage market for the farm workers, thereby increasing homogamy among these farm workers. Controlling for these structural changes, it is clear that social boundaries between farmers and farm workers prevailed at least until the end of the nineteenth century. Using a multivariate analysis, we are able to identify different family characteristics that led young men and woman to marry homogamously. The farmers, especially, exerted influence on their eldest sons to marry farmers' daughters, but the role of the father in the mating process also secured more economically viable partners for the other children too.