The U.S. immigrant population—estimated at 40.8 million in 2012 — is the nation’s historical numerical high, and it is also the largest foreign-born population in the world. About 20 percent of all international migrants reside in the United States, even as the country accounts for less than 5 percent of global population. This article presents the latest, most sought-after data on immigrants in the United States—by origin, residence, legal status, deportations, languages spoken, and more—in one easy-to-use resource.