Ionia is a city in Chickasaw County, Iowa, United States. The population was 226 at the time of the 2020 census. Geography Ionia is located at (43.034493, -92.456606). According to the United States Census Bureau, the city has a total area of , all land. Demographics 2010 census As of the census of 2010, there were 291 people, 119 households, and 74 families living in the city. The population density was . There were 133 housing units at an average density of . The racial makeup of the city was 99.7% White and 0.3% from other races. Hispanic or Latino of any race were 0.7% of the population. There were 119 households, of which 32.8% had children under the age of 18 living with them, 49.6% were married couples living together, 5.0% had a female householder with no husband present, 7.6% had a male householder with no wife present, and 37.8% were non-families. 32.8% of all households were made up of individuals, and 17.6% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 3.09. The median age in the city was 36.8 years. 30.2% of residents were under the age of 18; 5.6% were between the ages of 18 and 24; 21.3% were from 25 to 44; 27.5% were from 45 to 64; and 15.5% were 65 years of age or older. The gender makeup of the city was 50.5% male and 49.5% female. 2000 census As of the census of 2000, there were 277 people, 115 households, and 73 families living in the city. The population density was . There were 135 housing units at an average density of . The racial makeup of the city was 100.00% White. Hispanic or Latino of any race were 0.72% of the population. There were 115 households, out of which 31.3% had children under the age of 18 living with them, 57.4% were married couples living together, 3.5% had a female householder with no husband present, and 36.5% were non-families. 32.2% of all households were made up of individuals, and 16.5% had someone living alone who was 65 years of age or older. The average household size was 2.41 and the average family size was 3.12. In the city, the population was spread out, with 25.6% under the age of 18, 7.2% from 18 to 24, 29.2%