The Ellis Island Immigrant Hospital (also known as USPHS Hospital No. 43) was a United States Public Health Service hospital on Ellis Island, in New York Harbor, that operated from 1902 to 1951. The hospital is part of the Statue of Liberty National Monument. While the monument is managed by the National Park Service as part of the National Parks of New York Harbor office, the south side of Ellis Island, including the hospital, is managed by the non-profit Save Ellis Island Foundation and has been off-limits to the general public since its closing in 1954.
Constructed in phases, the facility encompassed both a general hospital and a separate pavilion-style contagious disease hospital. The hospital had two functions: treating immigrants who were ill upon arrival, and treating immigrants with conditions that were prohibited by immigration laws. These latter patients were stabilized and often sent back to their home countries. Between 1902 and 1951 the hospital treated over 275,000 patients; there were approximately 4,000 fatalities and 350 babies were born there.