Rio (pronounced "rye-oh") is a village in Columbia County, Wisconsin, United States. The population was 1,059 at the 2010 census. It is part of the Madison Metropolitan Statistical Area. The village rests primarily in the town of Otsego. The Village of Rio calls itself "Camper Country USA" due to several campgrounds located near the village. Rio is halfway between Columbus and Portage on Highway 16.
Rio is located at 43°26′52″N 89°14′26″W (43.447914, -89.240557).
According to the United States Census Bureau, the village has a total area of 1.27 square miles (3.29 km2), of which, 1.26 square miles (3.26 km2) of it is land and 0.01 square miles (0.03 km2) is water.
As a village, Rio is governed by a village board of trustees consisting of a village president and six village trustees. The president and trustees are elected in village-wide elections to two-year terms. The current village president is James Thomas Olrick, who has been in office since 2011.
As of the census of 2010, there were 1,059 people, 436 households, and 292 families living in the village.