households, out of which 47.3% had children under the age of 18 living with them, 61.7% were married couples living together, 11.1% had a female householder with no husband present, and 23.8% were non-families. 19.6% of all households were made up of individuals, and 5.0% 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 3.13. 32.7% are under the age of 18, 7.1% from 18 to 24, 39.2% from 25 to 44, 15.6% from 45 to 64, and 5.5% who were 65 years of age or older. The median age was 31 years. For every 100 females, there were 94.7 males. For every 100 females age 18 and over, there were 88.1 males. The median income for a household in the city was $56,275, and the median income for a family was $60,847. Males had a median income of $40,118 versus $31,588 for females. The per capita income for the city was $23,712. About 2.4% of families and 3.3% of the population were below the poverty line, including 2.7% of those under age 18 and 7.7% of those age 65 or over. Economy Japanese animation distributor and online retailer The Right Stuf International is headquartered in Grimes. The company occupies a office and distribution center. Parks and recreation Grimes has several parks. The main park is Water Works Park, where the public library is also located. A relatively new sports park is now located at the south end of Grimes. It includes a skate park, soccer fields, and baseball fields. Other parks in Grimes include: The Grimes Sports Complex, The Grimes Community Complex, Autumn Park, Beaverbrooke Park, Shawyer Park, North Pointe ParkG, and Glenstone Park. Government Grimes' city council meets the second and fourth Tuesday of the month. The mayor is Scott Mikkelsen. Education Grimes, along with Dallas Center, forms the Dallas Center–Grimes Community School District system which draws students from both Polk and Dallas County. The high school (grades 10 through 12) and Meadows (grades 8 and 9) form a campus located inside Grimes, and a middle school (grades 6 and 7) in Dallas Center. The district also has 4 elementary schools, South Prairie Elementary, North Ridge Elementary, and Heritage Elementary, which are all in Grimes, along with Dallas Center Elementary, which resides is Dallas Center. The school mascots are the Mustangs and the