Sioux Rapids is a city in Buena Vista County, Iowa, United States. The population was 748 at the time of the 2020 census. History Sioux Rapids was named from the Rapids on the Little Sioux River. In 1869, Sioux Rapids was designated the county seat of Buena Vista County. In 1876, the courthouse at Sioux Rapids burned, and in 1878, the county seat was transferred to Storm Lake. Geography Sioux Rapids is located at (42.892762, -95.147095). It is located on the Little Sioux River. According to the United States Census Bureau, the city has a total area of , all land. Gustafson Lake, as well as Gabrielson Park, are located south of the town. Climate Demographics 2010 census As of the census of 2010, there were 775 people, 325 households, and 196 families residing in the city. The population density was . There were 367 housing units at an average density of . The racial makeup of the city was 94.3% White, 0.6% African American, 0.1% Native American, 0.4% Asian, 3.9% from other races, and 0.6% from two or more races. Hispanic or Latino of any race were 8.4% of the population. There were 325 households, of which 30.5% had children under the age of 18 living with them, 45.2% were married couples living together, 9.5% had a female householder with no husband present, 5.5% had a male householder with no wife present, and 39.7% were non-families. 36.9% of all households were made up of individuals, and 14.8% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 3.02. The median age in the city was 40.8 years. 26.7% of residents were under the age of 18; 5% were between the ages of 18 and 24; 23.2% were from 25 to 44; 25.2% were from 45 to 64; and 19.9% were 65 years of age or older. The gender makeup of the city was 49.8% male and 50.2% female. 2000 census As of the census of 2000, there were 720 people, 306 households, and 201 families residing in the city. The population density was . There were 338 housing units at an average density of . The racial makeup of the city was 98.75% White, 0.14% Asian, 0.28% from other races, and 0.83% from two or more races. Hispanic or Latino of any race were 1.39%