Sumner is a city in Bremer County, Iowa, United States. The city is located along the county's eastern border, between Bremer and Fayette counties. The population was 2,021 at the time of the 2020 census. The Bremer County portion of Sumner is part of the Waterloo–Cedar Falls Metropolitan Statistical Area. The town was established in 1870, and incorporated in 1894. The community is named after American political leader Charles Sumner. Sumner is home to Life Line Emergency Vehicles, a major manufacturer of ambulances. Geography According to the United States Census Bureau, the city has a total area of , of which, is land and is water. Sumner is located on Iowa Highway 93. Demographics 2010 census As of the census of 2010, there were 2,028 people, 869 households, and 555 families living in the city. The population density was . There were 944 housing units at an average density of . The racial makeup of the city was 98.5% White, 0.8% Asian, 0.1% from other races, and 0.6% from two or more races. Hispanic or Latino of any race were 0.7% of the population. There were 869 households, of which 27.0% had children under the age of 18 living with them, 53.4% were married couples living together, 7.6% had a female householder with no husband present, 2.9% had a male householder with no wife present, and 36.1% were non-families. 33.0% of all households were made up of individuals, and 18.3% had someone living alone who was 65 years of age or older. The average household size was 2.24 and the average family size was 2.83. The median age in the city was 45.3 years. 22% of residents were under the age of 18; 5.9% were between the ages of 18 and 24; 21.7% were from 25 to 44; 25% were from 45 to 64; and 25.4% were 65 years of age or older. The gender makeup of the city was 45.8% male and 54.2% female. 2000 census As of the census of 2000, there were 2,106 people, 888 households, and 575 families living in the city. The population density was . There were 930 housing units at an average density of . The racial makeup of the city was 98.96% White, 0.19% African American, 0.43% Asian, 0.05% Pacific Islander, 0.09% from other races, and 0.28% from two or more races. Hispanic or Latino of any race were 0.66% of the