This study looks at whether increases in the housing affordability decreases residential segregation in the top 100 MSAs or Metropolitan Statistical Area. Housing affordability means that a family spends 30% or less of their income on housing costs. Housing affordability in the MSAs was measured by using the percentage of households in each MSA that was cost-burdened. Cost-burdened households are those that pay over 30% of their income on housing. According to Douglas Massey, “Segregation created the structural conditions for the emergence of an oppositional culture that devalues work, schooling, and marriage and that stresses attitudes and behaviors that are antithetical and often hostile to success in the larger economy.” Residential segregation enables other forms of racial oppression to persist in America’s society. The Dissimilarity Index measures residential segregation by the proportion of population of a particular group that needs to be relocated across the MSA to achieve an even distribution of two racial groups in a metropolitan area. The findings of this study suggests that there were slight changes in both housing affordability and residential segregation between 1990 and 2000.The results seem to indicate that the increases in the proportion of cost-burdened households correlates with decreases in residential segregation. Most of the MSAs that had a significant increase in the percentage of cost-burdened households experienced a decrease in the Dissimilarity Index score. Only one MSA did not fit this trend. There are many factors that could affect residential segregation and more research is required to see if the relationship between housing affordability and residential segregation is correlation or causal. "