9100 may refer to:A.D. 9100, a year in the 10th millennium CE 9100 BCE, a year in the 10th millennium BC 9100, a number in the 9000 (number) range 9100 Tomohisa, an asteroid in the Asteroid Belt, the 9100th asteroid registered; see List_of_minor_planets:_9001–10000 Holborn 9100, a Dutch personal computer CP Class 9100, a diesel railcar class Chiba New Town Railway 9100 series electric multiple unit train series Meitetsu 9100 series trains Qtek 9100, a branded version of the HTC Wizard smartphone