Marais des Cygnes Valley USD 456 is a public unified school district headquartered in Melvern, Kansas, United States. The district includes the communities of Melvern, Olivet, Quenemo, and nearby rural areas.
Most of the district is in Osage County. A portion is in Franklin County.
Marais des Cygnes Valley USD 456 is currently under the administration of Superintendent Brian Cordel.
The USD 456 Board of Education is currently under the leadership of President Greg McCurdy.
The school district operates the following schools: