Darnestown is also home to three locks on the C&O Canal. The town also borders the Montgomery County Agricultural Reserve, which is made up of lots of farmland and parks that many residents of Darnestown can appreciate. There is also a community softball league for adults in the community, with teams representing the different areas of Darnestown. It is also popular for residents to tube down the Great Seneca Creek from a starting point off of Berryville Road or Darnestown Road to the Seneca Aqueduct located near Pooles' Store, off River Road. Darnestown is also home to Seneca School House, the oldest existing schoolhouse in Montgomery County. The town is also home to a historic black community, living along Berryville Road. As of the census of 2000, there were 6,378 people, 2,038 households, and 1,830 families residing in the area. The population density was 384.6 people per square mile (148.5/km²). There were 2,064 housing units at an average density of 124.5/sq mi (48.1/km²). The racial makeup of the area was 85.06% White, 3.95% African American, 0.25% Native American, 7.92% Asian, 0.03% Pacific Islander, 0.58% from other races, and 2.21% from two or more races. Hispanic or Latino of any race were 3.23% of the population. There were 2,038 households out of which 47.9% had children under the age of 18 living with them, 83.3% were married couples living together, 4.1% had a female householder with no husband present, and 10.2% were non-families. 7.5% of all households were made up of individuals and 2.3% had someone living alone who was 65 years of age or older. The average household size was 3.13 and the average family size was 3.29. In the area, the population was spread out with 30.7% under the age of 18, 4.5% from 18 to 24, 25.5% from 25 to 44, 31.8% from 45 to 64, and 7.5% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 98.8 males. For every 100 females age 18 and over, there were 96.0 males.