commercial buildings are primarily brick and local granite masonry, with little decorative detailing. Commercial styles include single retail, multiple retail, and retail and office types. Within the historic district, there is some non-historic infill construction such as the 1968 Lithonia Plaza shopping center. The residential areas consist architecture typical of late 19th- to mid 20th-century types and styles. Residential neighborhoods also feature locally quarried granite and gneiss. House types and styles include the central hall Georgian cottage, gabled-wing cottage, Queen Anne cottage, New South cottage, pyramid cottage, bungalow, Ranch house, I-House and Queen Anne house. Landmark properties include the Masonic Lodge (1916), The Lithonia Women's Club (1928), the Lithonia First United Methodist Church (1910), Antioch Baptist Church (1911), Lithonia Presbyterian Church, The Union Missionary Church (1911), the Bruce Street equalization school (c.1953), and The Seminary (1895). Contributing sites in the district include two cemeteries, two parks, the former Georgia Railroad Quarry, and the ruins of the Bruce Street School for African-Americans (1938). The district is significant under National Register criterion A (association with historic events) and C (architecture), with areas of significance in Architecture, Black and European Ethnic Heritage, Community Planning and Development, Industry, and Transportation. Demographics 2020 census As of the 2020 United States census, there were 2,662 people, 938 households, and 524 families residing in the city. 2010 census Lithonia's city population was 1,924 at the 2010 census, over 799 households, and 560 families residing in the city. The population density was about 1,924 inhabitants per square mile (1,068.9/km2). There were 892 housing units at an average density of . The racial makeup of the city was 84.3% Black, 8.5% White, 0.05% Native American, 0.2% Asian, and 1.42% from other races. Hispanic or Latino of any race were 5.8% of the population. There were 799 households, out of which 40.8% had children under the age of 18 living with them, 33.3% were married couples living together, 22.6% had a female householder with no husband present, and 29.9% were non-families. 15.7% of all households were made up of individuals, and 4.8% had someone living alone who was 65 years of age or older. The average household size was 2.70 and the average family size was 3.25. In the city, the population was spread out, with 34.4% under the age of 18, 9.0% from 18 to 24, 27.4% from 25 to 44, 17.4% from 45 to 64, and 11.8% who