Denison is a city in Crawford County, Iowa, United States, along the Boyer River, and located in both Denison Township and East Boyer Township. The population was 8,373 at the time of the 2020 census. It is the county seat of Crawford County. History Denison was laid out in 1856; the town was incorporated in 1875. Denison was named for its founder, J. W. Denison. Geography Denison is located at (42.017187, −95.351124). According to the United States Census Bureau, the city has a total area of , of which, is land and is water. Climate According to the Köppen Climate Classification system, Denison has a hot-summer humid continental climate, abbreviated "Dfa" on climate maps. Demographics 2010 census At the 2010 census there were 8,298 people, 2,816 households, and 1,866 families living in the city. The population density was . There were 2,968 housing units at an average density of . The racial makeup of the city was 70.6% White, 2.3% African American, 0.6% Native American, 1.0% Asian, 0.2% Pacific Islander, 23.0% from other races, and 2.3% from two or more races. Hispanic or Latino of any race were 42.1%. Of the 2,816 households 38.0% had children under the age of 18 living with them, 48.8% were married couples living together, 11.1% had a female householder with no husband present, 6.4% had a male householder with no wife present, and 33.7% were non-families. 28.1% of households were one person and 13.7% were one person aged 65 or older. The average household size was 2.75 and the average family size was 3.36. The median age was 32.6 years. 29% of residents were under the age of 18; 11.3% were between the ages of 18 and 24; 24.5% were from 25 to 44; 21.3% were from 45 to 64; and 13.9% were 65 or older. The gender makeup of the city was 50.7% male and 49.3% female. 2000 census As of the census of 2000, there were 7,339 people, 2,674 households, and 1,756 families living in the city. The population density was . There were 2,837 housing units at an average density of . The racial makeup as reported by the Census was 86.92% White, 1.59% African American, 0.45% Native American, 0.82% Asian, 0.01% Pacific Islander, 9.02% from other races, and 1.19% from two or more races. Hispanic or Latino of any race were 17.36% of the population. Racial diversity in Dension has