This study used linear regression analysis to inspect influence of unemployment rates and economic development levels on income inequality in the United States and Germany. The results indicate that the level of economic development is the main driving factor for inequality of income in America, while in Germany, high unemployment and inflation can exacerbate income inequality. This study emphasizes the importance of labor market policies, social welfare policies, and tax policies in reducing income inequality. While the analysis only covers two countries, the results have significant policy implications for addressing income inequality. Future research can expand on the factors that contribute to income inequality.