Geisser is a surname. Notable people with the surname include:
Seymour Geisser (1929 – 2004), American statistician Thomas Geisser (born 1966), German mathematician Tobias Geisser (born 1999), Swiss professional ice hockey defenseman Vincent Geisser (born 1968), French sociologist and political scientist Walter Geisser (born 1950), Swiss former footballer Wilhelm Geisser (1889 –1964), Swiss footballer