Addison -- U.S. County in Vermont Population (2000): 35974 Housing Units (2000): 15312 Land area (2000): 770.180261 sq. miles (1994.757635 sq. km) Water area (2000): 38.121468 sq. miles (98.734144 sq. km) Total area (2000): 808.301729 sq. miles (2093.491779 sq. km) Located within: Vermont (VT), FIPS 50 Location: 44.032774 N, 73.167925 W Headwords: Addison Addison, VT Addison County Addison County, VT