Community School District. Geography Grand Mound is located at (41.824275, -90.646815). According to the United States Census Bureau, the city has a total area of , all land. Demographics 2010 census As of the census of 2010, there were 642 people, 243 households, and 185 families residing in the city. The population density was . There were 253 housing units at an average density of . The racial makeup of the city was 98.9% White, 0.3% Asian, and 0.8% from two or more races. Hispanic or Latino of any race were 1.7% of the population. There were 243 households, of which 34.6% had children under the age of 18 living with them, 63.4% were married couples living together, 7.8% had a female householder with no husband present, 4.9% had a male householder with no wife present, and 23.9% were non-families. 16.9% of all households were made up of individuals, and 7.4% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 2.99. The median age in the city was 39.5 years. 24.1% of residents were under the age of 18; 10.4% were between the ages of 18 and 24; 23.4% were from 25 to 44; 28.3% were from 45 to 64; and 13.6% were 65 years of age or older. The gender makeup of the city was 50.9% male and 49.1% female. 2000 census As of the census of 2000, there were 675 people, 254 households, and 196 families residing in the city. The population density was . There were 260 housing units at an average density of . The racial makeup of the city was 98.37% White, 0.15% Asian, and 1.48% from two or more races. Hispanic or Latino of any race were 1.33% of the population. There were 254 households, out of which 38.6% had children under the age of 18 living with them, 65.7% were married couples living together, 6.7% had a female householder with no husband present, and 22.8% were non-families. 20.9% of all households were made up of individuals, and 10.2% had someone living alone who was 65 years of age or older. The average household size was 2.66 and the average family size was 3.08. 28.1% are under the age of 18, 7.5% from 18 to 24, 29.9% from 25 to 44, 22.9% from 45 to 64, and 11.5% who