Range.—Known only from the islands in Bering Sea and the coast of Alaska.
Breeding range.—The Pribilof sandpiper breeds on the Pribilof Islands (St. Paul and St. George Islands) and north in Bering Sea to St. Matthew Island, Hall Island, and St. Lawrence Island.
Winter range.—The winter range is imperfectly known, but it has been taken in this season at Portage Bay, Alaska, and probably occupies much of the Alaskan coast southeastward to (rarely) the Lynn Canal.
Migration.—They have been noted in spring to arrive at St. Paul Island March 5; Nushagak, Alaska, April 1 to 14; St. George Island April 23; at St. Paul Island April 24; and Point Dall, Alaska, May 23.
Late departures in the fall have been observed at St. George Island, October 3; and St. Paul Island November 16.
Early fall arrivals have been noted on the Alaskan coast at Igiak Bay, July 23; Tigalda Island, August 5; Unimak, August 14; and Dexter, Norton Sound, August 29.
Egg dates.—Pribilof Island: 32 records, May 6 to July 2; 16 records, May 30 to June 11.