Population densities may have an impact on quality of life in urban environments, particularly in areas where high densities place a large burden on building infrastructures and maintenance. Over the course of the twentieth century urban planners in New York City have been faced with opposing demands of an increasing population on one hand and initiatives to decrease residential densities on the other. In this project we will use data from the NYC Housing and Vacancy Survey, as well as the Primary Land Use Tax Lot Output (PLUTO) data from the NYC Department of City Planning, to evaluate several population density measures. There are a number of ways to quantify population densities in cities and we will focus on several of these measures, for example, people per unit and the number of units in specified geographic areas, which impacted the development of the city in the 20th century. We will examine changes in these measures from 2002 to 2017, as well as their relationship in housing developments with proxies of quality of life such as building conditions and health status of residents. Based on these assessments, we will identify areas where these measures could be improved.