On N bank of Kuskokwim River, 24 mi. W of Aniak, Yukon-Kuskokwim Delta.
This village is listed as "Kaltkhagamute," with a population of 106 in the 1880 Census of I. Petroff. Post, U.S. Geological Survey (USGS), spells the name "Kal-tchagamut" on his 1898 fieldsheet, but places the village on the right bank of a slough, 4 miles southwest of the present village called "Kalskag." people have moved to Lower Kalskag and Kalskag. Incorporated as Upper Kalskag.