This research analyzes the effects of unauthorized immigration on unemployment levels in the states of Texas and California in the United States. Data from the Department of Homeland Security is utilized to best estimate the size of unauthorized populations. This research finds that a one person increase in the unauthorized population in the region leads to a 1.1556 person decrease in the region's unemployed population. This estimate implies that increases in unauthorized immigration has a net negative effect on unemployment levels, meaning that unauthorized immigration encourages higher levels of employment in these regions for foreign and native workers alike. Keywords: unauthorized immigration, unemployment, native labor, immigrant labo
