Southern Lyon County USD 252 is a public unified school district headquartered in Hartford, Kansas, United States.

[1] The district includes the communities of Hartford, Neosho Rapids, Olpe, and nearby rural areas.

[3] In 1965, Hartford, Neosho Rapids, and Olpe consolidated to form Southern Lyon County USD 252.

Apple products were brought in, giving teachers a MacBook Pro laptop and an iPad 2.

The elementary wing of the building adjoins the cafeteria to the west of the high school.