Ventura is a city in Cerro Gordo County, Iowa, United States. The population was 711 at the time of the 2020 census. It is part of the Mason City Micropolitan Statistical Area. Ventura is located on the northeastern basin of Clear Lake, making it an area with many lakeside areas. Geography Ventura is located at (43.126710, -93.473276). According to the United States Census Bureau, the city has a total area of , of which is land and is water. Demographics 2010 census As of the census of 2010, there were 717 people, 315 households, and 215 families living in the city. The population density was . There were 377 housing units at an average density of . The racial makeup of the city was 98.3% White, 0.6% Asian, 0.4% from other races, and 0.7% from two or more races. Hispanic or Latino of any race were 1.3% of the population. There were 315 households, of which 21.9% had children under the age of 18 living with them, 58.4% were married couples living together, 4.8% had a female householder with no husband present, 5.1% had a male householder with no wife present, and 31.7% were non-families. 24.4% of all households were made up of individuals, and 13.6% had someone living alone who was 65 years of age or older. The average household size was 2.28 and the average family size was 2.70. The median age in the city was 48.3 years. 18.5% of residents were under the age of 18; 5.4% were between the ages of 18 and 24; 20.5% were from 25 to 44; 34.1% were from 45 to 64; and 21.5% were 65 years of age or older. The gender makeup of the city was 51.5% male and 48.5% female. 2000 census As of the census of 2000, there were 670 people, 277 households, and 195 families living in the city. The population density was . There were 319 housing units at an average density of . The racial makeup of the city was 99.40% White and 0.60% Asian. Hispanic or Latino of any race were 0.30% of the population. There were 277 households, out of which 32.1% had children under the age of 18 living with them, 61.0% were married couples living together, 6.9% had a female householder with no husband present, and 29.6% were non-families. 25.6% of all households were made up of individuals, and 11.6% had