Winooski (/wɪnuːski/) is a city in Chittenden County, Vermont, in the United States. Located at the mouth of the Winooski River, as of the 2010 census the city population was 7,267. It is part of the Burlington-South Burlington, VT Metropolitan Statistical Area.
According to the United States Census Bureau, the city has a total area of 1.5 square miles (3.9 km2), of which, 1.4 square miles (3.7 km2) of it is land and 0.1 square miles (0.2 km2) of it (5.30%) is water.
The word "winooski" comes from the language of the Abenaki tribe, and means "this is where the wild onions grow".