3100

3100 may refer to:

In general

 * A.D. 3100, a year in the 4th millennium CE
 * 3100 BC, a year in the 4th millennium BCE
 * 3100, a number in the 3000 (number) range

Other uses

 * 3100: Run and Become (film), a 2018 documentary film about runners
 * 3100 Zimmerman, an asteroid in the Asteroid Belt, the 3100th asteroid registered
 * Hawaii Route 3100, a state highway
 * Chevrolet 3100, a truck
 * Nokia 3100, a cellphone
 * Southern Pacific 3100, a diesel-electric locomotive on display at the Southern California Railway Museum