Pomeroy is a city in Calhoun County, Iowa, United States. The population was 526 at the time of the 2020 census. History Pomeroy was platted in 1870 in anticipation of the railroad being built through the settlement. It was named for Charles Pomeroy, an Iowa politician. On July 6, 1893, Pomeroy was struck by a tornado that was later estimated to be F5 on the Fujita scale. With a damage path wide and long, the tornado destroyed about 80% of the homes in Pomeroy. The tornado killed 71 people and injured 200. Geography Pomeroy is located at (42.548395, -94.683541). According to the United States Census Bureau, the city has a total area of , all land. Pomeroy lies within the western side of Manson crater, an impact structure buried by glacial till and outwash. Demographics 2010 census As of the census of 2010, there were 662 people, 280 households, and 171 families living in the city. The population density was . There were 350 housing units at an average density of . The racial makeup of the city was 96.8% White, 0.5% African American, 1.1% Native American, 0.3% Asian, 0.9% from other races, and 0.5% from two or more races. Hispanic or Latino of any race were 3.2% of the population. There were 280 households, of which 24.6% had children under the age of 18 living with them, 49.3% were married couples living together, 7.1% had a female householder with no husband present, 4.6% had a male householder with no wife present, and 38.9% were non-families. 35.0% of all households were made up of individuals, and 20.3% had someone living alone who was 65 years of age or older. The average household size was 2.25 and the average family size was 2.90. The median age in the city was 47 years. 21.5% of residents were under the age of 18; 8.9% were between the ages of 18 and 24; 17.6% were from 25 to 44; 23.4% were from 45 to 64; and 28.4% were 65 years of age or older. The gender makeup of the city was 47.3% male and 52.7% female. 2000 census As of the census of 2000, there were 710 people, 314 households, and 184 families living in the city. The population density was . There were 356 housing units at an average density of . The racial makeup of the city was 99.58% White, 0.14% Native