A post anchor includes a ground engaging portion in the form of fins and a post receiving portion that has an oversized top and angled, linear segment or circular impressions below. The impressions form a clamp when downward force is applied to seat the post that is inserted into the post receiving portion. Adjustment in plumb can be made by moving the top of the post to the desired location and inserting hardware at the top edge of the receiving portion. A damaged post can be replaced by removing the hardware, replacing the post and reinserting the connection hardware.