Abstract: A hollow core post anchor includes a base plate and a post mounting protrusion. The base plate has two mounting holes adjacent opposing corners of the base plate, and L-shaped stabilizing supports at or adjacent to the other two opposing corners of the base plate. The post mounting protrusion includes a post mounting hole therethrough for receiving a carriage bolt. The two mounting holes in the base plate are each operable to receive a lag screw to secure the base plate and post anchor to a surface (e.g., a concrete pier or foundation). A hollow core post is then positioned on the post mounting protrusion, and securing a carriage bolt through the hollow core post and post mounting hole in the post mounting protrusion secure the hollow core post to the post anchor and thus to the surface.