By matching the population registers with the land tax roster, the authors examine how a family's socioeconomic status, represented by the size of landholding, affected fertility behaviors among Korean women in a village of Jeju Island for the period from 1914 to 1925. Landholding is an important indicator of a family's socioeconomic condition, especially for this historical population, the majority of whom were engaged in agricultural work. The authors' discrete-time event history model shows that women in households with larger landholding sizes had a greater risk of birth than their counterparts in households with smaller landholding sizes. However, the relationship is not linear, showing no significant difference between the two highest groups of landholding. The authors interpret the nonlinear relationship in light of economic and agricultural conditions of the island. They highlight potential contributions of their findings for historical studies of population and families in East Asia.