Horicon is a city in Dodge County, Wisconsin, United States. The population was 3,775 at the 2000 census.
Horicon is located at 43°26′54″N 88°37′57″W / 43.44833°N 88.6325°W / 43.44833; -88.6325 (43.448292, -88.632389). The city of Horicon is located at the southernmost tip of the Horicon Marsh. Tourists flock to the area every year to see the migration of the Canada Geese.
According to the United States Census Bureau, the city has a total area of 3.4 square miles (8.8 km²), of which, 3.3 square miles (8.7 km²) of it is land and 0.04 square miles (0.1 km²) of it (1.18%) is water.