Jacobs Nunatak (84°17′S 159°38′E / 84.283°S 159.633°ECoordinates: 84°17′S 159°38′E / 84.283°S 159.633°E) is a nunatak on the west side of the MacAlpine Hills, Antarctica, just west of the head of Sylwester Glacier. It was named by the Advisory Committee on Antarctic Names for Willis S. Jacobs, a United States Antarctic Research Program geomagnetist and seismologist at South Pole Station in 1959.
This article incorporates public domain material from the United States Geological Survey document "Jacobs Nunatak" (content from the Geographic Names Information System).