Shell Rock is a city in Butler County, Iowa, United States, along the Shell Rock River. The population was 1,296 at the 2010 census. The city is located along the county's eastern border, between Butler and Bremer counties.GeographyShell Rock is located at .According to the United States Census Bureau, the city has a total area of 1.66sqmi, of which, 1.56sqmi is land and 0.10sqmi is water.Demographics2010 censusAs of the census of 2010, there were 1,296 people, 554 households, and 363 families residing in the city. The population density was 830.8PD/sqmi. There were 588 housing units at an average density of 376.9/sqmi. The racial makeup of the city was 97.5% White, 0.4% Native American, 0.2% Asian, 0.3% from other races, and 1.6% from two or more races. Hispanic or Latino of any race were 1.2% of the population.There were 554 households of which 27.4% had children under the age of 18 living with them, 53.8% were married couples living together, 6.9% had a female householder with no husband present, 4.9% had a male householder with no wife present, and 34.5% were non-families. 30.9% of all households were made up of individuals and 15.7% had someone living alone who was 65 years of age or older. The average household size was 2.26 and the average family size was 2.81.
