As of the census of 2000, there were 10,916 people, 3,435 households, and 2,985 families residing in the CDP. The population density was 2,262.3 per square mile. There were 3,493 housing units at an average density of 723.9/sq mi. The racial makeup of the CDP was 86.02% White, 5.61% African American, 0.22% Native American, 5.60% Asian, 0.03% Pacific Islander, 1.36% from other races, and 1.17% from two or more races. Hispanic or Latino of any race were 5.04% of the population. There were 3,435 households, out of which 39.4% had children under the age of 18 living with them, 74.9% were married couplesliving together, 9.0% had a female householder with no husband present, and 13.1% were non-families. 10.1% of all households were made up of individuals, and 4.9% had someone living alone who was 65 years of age or older. The average household size was 3.15 and the average family size was 3.36. Elwood is a School District. In the CDP, the population was spread out, with 26.1% under the age of 18, 5.8% from 18 to 24, 30.6% from 25 to 44, 24.5% from 45 to 64, and 13.0% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 95.5 males. For every 100 females age 18 and over, there were 93.2 males. The median income for a household in the CDP was $89,424, and the median income for a family was $94,404. Males had a median income of $63,534 versus $41,341 for females. The per capita income for the CDP was $32,655. About 1.2% of families and 2.1% of the population were below the poverty line, including 2.3% of those under age 18 and 2.3% of those age 65 or over. As of the 2010 census, the demographics have changed slightly. They are now 82.12% White, 6.24% Black or African American, 7.96% Asian, 1.95% Some Other Race, and 1.58% Two or More Races. Native Americans made up 0.11% of the population, with 0.04 of the population being Native Hawaiian or Pacific Islander. People who were Hispanic or Latino of any race made up 8.21% of the population
Economy
The Dairy Barn convenience store chain, owned by Oak Tree Dairy, is headquartered in Elwood.
Trivia
Radio show host Anthony Cumia lived in Elwood twice and attended Elwood-John H. Glenn High School.
