Mailman School of Public Health, is the public health graduate school of Columbia University. Located on the Columbia University Medical Center campus in the Washington Heights neighborhood of Manhattan, New York City, the school is recognized by the Council on Education for Public Health.

The Mailman School is considered a preeminent school of public health in the United States. The school began in 1922 as the DeLamar Institute of Public Health. It became an official school within the university in 1945. In 1999, following a $33 million grant from the Joseph L. Mailman Foundation, the school was renamed the Joseph L. Mailman School of Public Health.

The school is ranked among the top public health schools in the nation by the U.S. News & World Report. Currently, the school enrolls over 1,400 students and is one of the largest recipients for sponsored research pertaining to public health