This annual publication is the only long-standing, comprehensive information resource on international students and scholars in the United States and American students studying abroad for academic credit. "Open Doors" features graphic displays, data tables, and policy-oriented analyses and is an essential resource for those concerned with U.S. international educational exchange. The Institute of International Education (IIE), one of the largest and most experienced higher education exchange agencies in the world, has conducted an annual statistical survey of international educational exchange activity into and out of the United States since 1948. This survey has been sponsored by the U.S. Department of State with funding provided by the U.S. Government since 1972. This 2019 report contains the results of that survey, and provides 132 pages of detailed information and analysis on the 1,095,299 international students in the U.S. in 2018-2019, including national origin, field of study, geographic location in the United States, host institutional type, finances, and personal characteristics. The report also contains detailed information on the 341,751 U.S. students who studied abroad for academic credit in 2017-2018, on the 136,563 international scholars who taught and conducted research at U.S. colleges and universities in 2018-2019, and on the 78,098 international students enrolled in intensive English programs in the United States in 2018.