Citizenship and Immigration Statuses of the U.S. Foreign-Born Population [Updated July 18, 2022] [open pdf - 604KB]
From the Document: "The U.S. foreign-born population consists of individuals living in the United States who were not U.S. citizens at birth. In 2020--the most recent data from the American Community Survey (ACS)--an estimated 44.1 million foreign-born people resided in the United States, representing 13.5% of the total U.S. population. The ACS is a U.S. Census Bureau survey conducted each month with a sample of households in 50 U.S. states, the District of Columbia, and Puerto Rico. The proportion of foreign-born individuals among the total U.S. population has changed over time. The percentage of foreign-born persons in 1920 (13.2%) was similar to current levels. It then declined over the next five decades, reaching a low of 4.7% in 1970. Over the last five decades, the proportion has increased [...]."
CRS In Focus, IF11806
Congressional Research Service: https://crsreports.congress.gov/