Des Moines is located on the east shore of Puget Sound, approximately halfway between the major cities of Seattle and Tacoma. The city is bordered by the suburbs of Federal Way to the south, Kent to the east, Sea-Tac to the northeast, Burien to the north, and Normandy Park to the northwest. It is one of the few points along this shoreline where the topography facilitates access to the water, and a recreational marina operated by the city, with moorage, boat launching and pier fishing facilities, is located there. Forested Saltwater State Park on a steep ravine between the Zenith and Woodmont neighborhoods is the most-used State Park on the Sound. Near the border of Federal Way, Redondo Beach has a board-walk complete with a Salty's restaurant and a pay parking lot. The town is also home to Highline Community College.
As of the census of 2000, there were 29,267 people, 11,337 households, and 7,289 families residing in the city. The population density was 4,616.5 people per square mile (1,782.3/km²). There were 11,777 housing units at an average density of 1,857.7/sq mi (717.2/km²). The racial makeup of the city was 74.15% White, 7.20% African American, 0.96% Native American, 8.28% Asian, 1.34% Pacific Islander, 3.32% from other races, and 4.76% from two or more races. Hispanic or Latino of any race were 6.61% of the population.
There were 11,337 households out of which 30.4% had children under the age of 18 living with them, 47.1% were married couples living together, 12.2% had a female householder with no husband present, and 35.7% were non-families. 27.8% of all households were made up of individuals and 6.9% had someone living alone who was 65 years of age or older. The average household size was 2.47 and the average family size was 3.02.
In the city the population was spread out with 23.8% under the age of 18, 8.3% from 18 to 24, 31.1% from 25 to 44, 22.0% from 45 to 64, and 14.9% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 93.0 males. For every 100 females age 18 and over, there were 89.4 males.
The median income for a household in the city was $48,971, and the median income for a family was $57,003. Males had a median income of $40,007 versus $30,553 for females. The per capita income for the city was $24,127. About 5.6% of families and 7.6% of the population were below the poverty line, including 9.6% of those under age 18 and 2.8% of those age 65 or over.