84 Lumber is an operated American building materials supply company. Founded in 1956 by Joseph Hardy, it derives its name from the unincorporated village of Eighty Four, Pennsylvania, a census-designated place 20 miles south of Pittsburgh, where its headquarters are located.

Founded: November 14, 1956

Headquarters: Eighty Four, PA

CEO: Maggie Hardy Magerko (1992–)

Founder: Joseph A. Hardy III

Revenue: 3.9 billion USD (2020)

Subsidiaries: Pierce Hardy Limited Partnership, 84 Components Company

Type of business: Privately held company