Cedar Hill is a census-designated place (CDP) in Jefferson County, Missouri, United States. The estimated population in 2007 was 1,848. It was 1,703 at the 2000 census.
A post office called Cedar Hill has been in operation since 1868. The community was named for cedar trees near the elevated town site.
Cedar Hill is located at 38°21′22″N 90°38′30″W (38.356193, -90.641681).
According to the United States Census Bureau, the CDP has a total area of 2.3 square miles (6.0 km2), all of it land.
Cedar Hill is located on the Big River, and is the site of an old mill and dam.
As of the census of 2000, there were 1,703 people, 627 households, and 465 families residing in the CDP. The population density was 741.6 people per square mile (285.9/km²). There were 657 housing units at an average density of 286.1/sq mi (110.3/km²). The racial makeup of the CDP was 97.89% White, 0.06% Black, 0.82% Indian, 0.18% Asian, 0.35% from other races, and 0.70% from two or more races. Hispanic or Latino of any race were 0.82% of the population.
There were 627 households out of which 38.8% had children under the age of 18 living with them, 56.5% were married couples living together, 11.5% had a female householder with no husband present, and 25.7% were non-families. 19.6% of all households were made up of individuals and 7.0% had someone living alone who was 65 years of age or older. The average household size was 2.72 and the average family size was 3.11.
In the CDP, the population was spread out with 27.2% under the age of 18, 9.9% from 18 to 24, 30.0% from 25 to 44, 24.7% from 45 to 64, and 8.2% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 97.1 males. For every 100 females age 18 and over, there were 95.1 males.
The median income for a household in the CDP was $35,481, and the median income for a family was $43,214. Males had a median income of $40,160 versus $21,074 for females. The per capita income for the CDP was $15,599. About 5.7% of families and 12.9% of the population were below the poverty line, including 6.1% of those under age 18 and 8.8% of those age 65 or over.