Hagemeister is a German surname. Notable people with the surname include:
Charles C. Hagemeister (born 1946), United States Army officer and Medal of Honor recipient
Henry F. Hagemeister (1855–1915), American politician
Karl Hagemeister (1848-1933), German landscape painter
Ludwig von Hagemeister (1780–1833), Imperial Russian explorer
Michael Hagemeister (born 1951), German scholar, historian and Slavist