According to the United States Census Bureau, the CDP has a total area of 9.3 square miles (24 km2), of which, 9.2 square miles (24 km2) of it is land and 0.1 square miles (0.26 km2) of it (8.18%) is water.
Landmark CDP, Arkansas – Demographic Profile (NH = Non-Hispanic) Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.
As of the census[9] of 2000, there were 3,499 people, 1,434 households, and 1,059 families residing in the CDP. The population density was 378.0 inhabitants per square mile (145.9/km2). There were 1,564 housing units at an average density of 168.9 per square mile (65.2/km2). The racial makeup of the CDP was 85.05% White, 11.37% Black or African American, 0.40% Native American, 0.51% Asian, 0.74% from other races, and 1.91% from two or more races. 1.66% of the population were Hispanic or Latino of any race.
There were 1,434 households, out of which 26.5% had children under the age of 18 living with them, 59.8% were married couples living together, 10.7% had a female householder with no husband present, and 26.1% were non-families. 22.2% of all households were made up of individuals, and 6.6% had someone living alone who was 65 years of age or older. The average household size was 2.44 and the average family size was 2.82.
In the CDP, the population was spread out, with 20.9% under the age of 18, 8.4% from 18 to 24, 29.4% from 25 to 44, 29.7% from 45 to 64, and 11.5% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 96.7 males. For every 100 females aged 18 and over, there were 96.7 males.
The median income for a household in the CDP was $39,766, and the median income for a family was $47,813. Males had a median income of $31,782 versus $25,205 for females. The per capita income for the CDP was $19,508. About 3.4% of families and 4.6% of the population were below the poverty line, including 4.8% of those under age 18 and 1.1% of those age 65 or over.
Landmark CDP is divided between Landmark and Daisy Bates elementary schools, and all parts are zoned to Fuller Middle School and Wilbur D. Mills High School.[12]
