available. Four large riverside warehouses opened and a large flour mill, stores, and hotels appeared during this period. The steamboat trade deposited merchandise and picked up farm produce, milled flour and lead ore. Guttenberg experienced many floods, the most recent and devastating being in 1965, after which a levee was built. Today, Guttenberg's population is 1,817 and it is the largest town in Clayton County. Geography Guttenberg is located at (42.785992, -91.101366). According to the United States Census Bureau, the city has a total area of , of which, is land and is water. The community is next to the Mississippi River across from Wisconsin and is on US Route 52. Climate Guttenberg has a humid continental climate (Köppen climate classification Dfa). Demographics 2020 census As of the census of 2020, the population was 1,817. The population density was . There were 1,047 housing units at an average density of . The racial makeup of the city was 96.0% White, 0.4% Black or African American, 0.4% Native American, 0.2% Asian, 0.1% Pacific Islander, 0.8% from other races, and 2.1% from two or more races. Ethnically, the population was 0.8% Hispanic or Latino of any race. 2010 census As of the census of 2010, there were 1,919 people, 887 households, and 516 families residing in the city. The population density was . There were 1,085 housing units at an average density of . The racial makeup of the city was 98.3% White, 0.2% African American, 0.5% Asian, 0.1% Pacific Islander, 0.4% from other races, and 0.5% from two or more races. Hispanic or Latino of any race were 1.3% of the population. There were 887 households, of which 20.2% had children under the age of 18 living with them, 47.8% were married couples living together, 7.0% had a female householder with no husband present, 3.4% had a male householder with no wife present, and 41.8% were non-families. 37.4% of all households were made up of individuals, and 21.1% had someone living alone who was 65 years of age or older. The average household size was 2.06 and the average family size was 2.66. The median age in the city was 51.3 years. 17.2% of residents were under the age of 18; 5.7% were between the ages of 18 and 24; 16.9% were from 25 to 44; 32.4% were from 45 to 64; and 27.8% were 65 years of age or older.