Geiger may refer to:
People Geiger (surname) Geiger, standard author abbreviation of Philipp Lorenz Geiger (1785–1836), German pharmacist and chemist
Places Geiger, Alabama, United States, a town Geiger, South Sudan, a border town filled with refugees Geiger Key, Florida, United States, an island in the Florida Keys Geiger (crater), a lunar impact crater on the far side of the Moon Camp Geiger, a United States Marine Corps base Camp Geiger (Boy Scouts of America), a Boy Scouts camp in Missouri, United States Geiger Field, a World War II training base near Spokane, Washington, United States
Businesses Geiger (corporation), a promotional products company Geiger Engineering, a German aircraft engine manufacturer Geiger Engineers, an American structural engineering consulting firm Hotel Geiger, a traditional hotel complex located in Bischofswiesen, Upper Bavaria, Germany
Other uses Geiger counter, a device for detecting radiation Geiger tree (Cordia sebestena), a species of flowering plant Geiger, an Image Comics series by Geoff Johns Geiger (Marvel Comics), a minor, teenage, Marvel Comics superheroine USNS Geiger, a United States Navy transport ship
See also Giger, a surname Guyger, a surname