"We make use of uniquely comprehensive arrest data from the Texas Department of Public Safety to compare the criminality of undocumented immigrants to legal immigrants and native-born US citizens between 2012 and 2018. We find that undocumented immigrants have substantially lower crime rates than native-born citizens and legal immigrants across a range of felony offenses. Relative to undocumented immigrants, US-born citizens are over 2 times more likely to be arrested for violent crimes, 2.5 times more likely to be arrested for drug crimes, and over 4 times more likely to be arrested for property crimes. In addition, the proportion of arrests involving undocumented immigrants in Texas was relatively stable or decreasing over this period. The differences between US-born citizens and undocumented immigrants are robust to using alternative estimates of the broader undocumented population, alternate classifications of those counted as “undocumented” at arrest and substituting misdemeanors or convictions as measures of crime. The tripling of the undocumented population in recent decades is one of the most consequential and controversial social trends in the United States. Backlash regarding the criminality of undocumented immigrants is at the fore of this controversy and has led to immigration reforms and public policies intended to reduce the crimes associated with undocumented immigration. As recently as June of 2020, the debate on undocumented criminality made its way to the US Supreme Court, where the US solicitor general sought to invalidate California’s “sanctuary” policies because “[w]hen officers are unable to arrest aliens—often criminal aliens—who are in removal proceedings or have been ordered removed from the United States, those aliens instead return to the community, where criminal aliens are disproportionately likely to commit crimes”. Indeed, concerns over illegal immigration have arguably been the government’s chief criminal law enforcement priority for years, to the point where the federal government now spends more on immigration enforcement than all other principle criminal law enforcement agencies combined."