3440 may refer to:
A.D. 3440, a year in the 4th millennium CE 3440 BC, a year in the 4th millennium BCE 3440, a number in the 3000 (number) range
Other uses 3440 Stampfer, an asteroid in the Asteroid Belt, the 3440th asteroid registered Texas Farm to Market Road 3440, a state highway GWR 3700 Class 3440 City of Truro (engine #3440), a steam locomotive preserved at the GWR Museum in Swindon
See also
H.R. 3440 (disambiguation)