Garrett Park is a town in Montgomery County, Maryland, United States. It was named after a former president of the Baltimore and Ohio Railroad, Robert W. Garrett. The population was 996 at the 2020 census. Garrett Park is home to Garrett Park Elementary School, located just outside the town proper.

John Work Garrett was an American merchant turned banker who became president of the Baltimore and Ohio Railroad (B&O) in 1858 and led the railroad for nearly three decades. The B&O became one of the most important American railroads by the time Garrett died, and Garret would also become a noted philanthropist. He provided crucial support for the Union cause during the Civil War, expanded the railroad to reach Chicago, Illinois, and competed with the Pennsylvania Railroad for access to New York City.