Mount Sergief
{{Short description|Stratovolcano in Alaska, United States}}
{{Use mdy dates|date=January 2025}}
{{Infobox mountain
|name=Mount Sergief
|map=Alaska
|map_caption=Location in Alaska
|elevation=
|range=Aleutian Range
|type=Stratovolcano
|coordinates={{coord|52|03|12|N|174|57|08|W|type:mountain_region:US-AK|display=inline,title}}
|elevation_m=1837
|last_eruption=Pleistocene
|location=Alaska, United States
}}
Mount Sergief is a stratovolcano located on the Aleutian island of Atka in the U.S. state of Alaska.{{cite gnis|1419222|Mount Sergief|2019-09-24}} Its highest point is 1,837 ft (560 m) above sea level.{{Cite web|url=https://avo.alaska.edu/volcanoes/volcinfo.php?volcname=Sergief|title=Sergief - Introduction|website=avo.alaska.edu|access-date=2019-08-22}}
Its last eruption was during the Pleistocene.{{cite gvp|name=Sergief|vn=311150|access-date=2021-06-28}}