The Harbison-Walker Refractories Company is a national historic district and historic refractory brick manufacturing complex which is located in Mount Union in Huntingdon County, Pennsylvania.

It originated as the Star Firebrick Company on March 7, 1865, with Articles of Association by a group of Pittsburgh and Allegheny residents.

[1] On January 30, 1875, Hay Walker Sr. and Samuel P. Harbison entered Articles of Agreement to purchase the interests in Star Fire Brick Company and formed the Harbison and Walker Company.

[5] A national historic district and historic refractory brick manufacturing complex which is located in Mount Union in Huntingdon County, Pennsylvania, the Harbison-Walker Refractories Company property consists of fourteen contributing buildings and twenty-seven contributing structures, which were built in two sections; the No.

Principal buildings and structures include brick kilns; mixing, molding, and drying facilities; storage and shipping sheds; a pattern making building; and crushing and screening facilities.