located at (41.327795, −88.701121). The city is at the head of a rapids in the Illinois River historically known as "the Grand Rapids" or the "Rapids of Maninumba". According to the 2010 census, Marseilles has a total area of , of which (or 94.72%) is land and (or 5.28%) is water. Demographics As of the 2020 census there were 4,845 people, 1,937 households, and 1,327 families residing in the city. The population density was . There were 2,273 housing units at an average density of . The racial makeup of the city was 88.3% White, 0.8% African American, 0.5% Native American, 0.5% Asian, 3.0% from other races, and 7.0% from two or more races. Hispanic or Latino of any race were 7.2% of the population. There were 1,937 households, out of which 27.9% had children under the age of 18 living with them, 51.1% were married couples living together, 8.9% had a female householder with no husband present. 29.0% of all households were made up of individuals, and 11.4% had someone living alone who was 65 years of age or older. The average household size was 2.33 and the average family size was 2.90 The city's age distribution consisted of 25.5% under the age of 18, and 19.2% who were 65 years of age or older. The median age was 41.8 years, and for every 100 females there were 98.3 males. The median income for a household in the city was $51,835, and the median income for a family was $69,537. The per capita income was $26,182. 16.0% of families and 20.3% of individuals were below the poverty line, including 32.1% of those under 18 and 7.3% of those over 65. See also William D. Boyce William H. Stead Chicago, Rock Island and Pacific Railroad Depot (Marseilles, Illinois) References External links City of Marseilles, Illinois Marseilles Museum Cities in Illinois Ottawa, IL Micropolitan Statistical Area Cities in LaSalle County, Illinois Populated places established in 1835 1835 establishments in Illinois