Montesano, Washington, is a city in Grays Harbor County, Washington, United States.
Montesano may also refer to:
Places Montesano Salentino, Italian municipality in the Province of Lecce Montesano sulla Marcellana, Italian municipality in the Province of Salerno Monte Sano Mountain, in the U.S. state of Alabama
People Enrico Montesano (born 1945), Italian actor Michael Montesano (born 1954), American politician
Other Montesano (sternwheeler), steamboat that operated in Oregon and Washington, U.S., in the late 19th century