Mor Stein is a neolithic standing stone in the southeastern part of the island of Shapinsay, Orkney Islands, Scotland.^[1] Shapinsay is one of the two large inner islands of the Orkney group, and it is situated approximately two miles north of the Orkney Mainland.^[2] Linton Bay is situated slightly to the northeast of Mor Stein.

Mor Stein is a vertical standing stone of approximately 3.2 metres (10 ft) in height, which is unshaped and uncarved and stands in a field somewhat separate from any other man-made features of the island.^[3] A few miles to the north is Burroughston Broch with its earth cladding intact, allowing visitors to peer down into the broch from above.^[4]