Ventura is a city in Cerro Gordo County, Iowa, United States. The population was 670 at the 2000 census. It is part of the Mason City Micropolitan Statistical Area.
Ventura is located at 43°7′36″N 93°28′24″W / 43.12667°N 93.47333°W / 43.12667; -93.47333 (43.126710, -93.473276).
According to the United States Census Bureau, the city has a total area of 2.4 square miles (6.1 km²), of which, 1.7 square miles (4.5 km²) of it is land and 0.6 square miles (1.7 km²) of it (27.00%) is water.