The study identified factors affecting the income of migrant households in Trieu Son district, Thanh Hoa province. To achieve this goal, in this study we surveyed 385 migrant households in the study area. The analysis of the multivariate linear regression model has identified three factors that have significant impacts on household income, including (i) the number of migrants, (ii) Number of activities income generation activities, (iii) Destination of migrants. On this basis, the study offers some meaningful solutions to improve income and ensure the lives of migrant households in Trieu Son district, Thanh Hoa province in the near future.