The ultimate goal of economic development is a better change in people's welfare. Researchers and policymakers have conducted many discussions, studies, and policies to improve people's welfare. Welfare can be measured using changes in per capita income. This study aims to examine the impact of road infrastructure, population density, and control variables on people's income. The researcher used the GLS fixed effect regression model with secondary data. Secondary data was from the publication of the Central Statistics Agency, and the sample size was 13 sub-districts (individuals) from 2016 -2020. The results show that road infrastructure is not a significant determinant of increasing people's income. Meanwhile, population density significantly affects people's income. In other words, increasing population density can determine changes in people's welfare non-linearly. The more significant the increase in the number of people who have productivity, skills, and education, naturally and urbanization at a certain threshold can increase income. The findings of this study can contribute to the literature and the population management policies in Tangerang City.