Westerhout is a Dutch surname.
Westerhout may also refer to:
People with the surname Alexander Westerhout (1590–1661), a Dutch glass painter Gart Westerhout (1927–2012), a Dutch astronomer Madeleine Westerhout (born 1990), an American political secretary
Other A 20th-century astronomical catalog, including W40, W43, and W49 The asteroid 5105 Westerhout (also known as )