Chittenden () is a town in Rutland County, Vermont, United States. The population was 1,258 at the 2010 census.
By area the largest town in the state, Chittenden was named after Thomas Chittenden, one of the Green Mountain Boys and governor of both the independent Vermont Republic, and later, the state of Vermont. Chittenden and his son Noah were among the town's principal land grantees, although the governor may have never visited the area.
The Chittenden Reservoir is a popular regional swimming and boating area.
According to the United States Census Bureau, the town has a total area of 74.2 square miles (192.2 km2), of which 73.0 square miles (189.1 km2) is land and 1.2 square miles (3.1 km2 or 1.62%) is water. It is the largest town by area in Vermont, slightly larger than Stowe in Lamoille County.
The town is split in two by a ridge of the Green Mountains, and only the western half of the town is settled. Much of the town remains unbroken forest.
At the 2000 census, there were 1,182 people, 451 households and 345 families residing in the town. The population density was 16.2 per square mile (6.3/km2).