Lammers Glacier () is a large glacier flowing east along the north side of Godfrey Upland into the Traffic Circle and Mercator Ice Piedmont, on the east coast of Graham Land, Antarctica. This glacier appears indistinctly in an aerial photograph taken by Sir Hubert Wilkins on December 20, 1928, but shows more clearly in aerial photographs taken by Lincoln Ellsworth in 1935 and the United States Antarctic Service in 1940.