Danville is a town located in a part of Contra Costa County, California called the San Ramon Valley, United States. As of the 2000 census, the town had a total population of 41,715.
Danville is located at 37°48'41" North, 121°58'27" West (37.811476, -121.974192).
Adjoining towns and cities are San Ramon to the south, Diablo and Blackhawk to the east, and Alamo to the north.
Interstate 680 serves as the main means of transport out of the town.
According to the United States Census Bureau, the town has a total area of 46.9 km2 (18.1 mi2). All of it is land and none of it is covered by water.
As of the census of 2000, there are 41,715 people, 14,816 households, and 11,867 families residing in the town. The population density is 890.3/km2 (2,305.6/mi2). There are 15,130 housing units at an average density of 322.9/km2 (836.2/mi2). The racial makeup of the town is 86.30% White, 0.92% Black or African American, 0.21% Native American, 9.00% Asian, 0.12% Pacific Islander, 0.91% from other races, and 2.55% from two or more races. 4.66% of the population are Hispanic or Latino of any race.
There are 14,816 households out of which 42.2% have children under the age of 18 living with them, 70.7% are married couples living together, 7.1% have a female householder with no husband present, and 19.9% are non-families. 15.5% of all households are made up of individuals and 5.6% have someone living alone who is 65 years of age or older. The average household size is 2.78 and the average family size is 3.13.
In the town the population is spread out with 28.6% under the age of 18, 4.2% from 18 to 24, 27.7% from 25 to 44, 29.3% from 45 to 64, and 10.3% who are 65 years of age or older. The median age is 40 years. For every 100 females there are 94.1 males. For every 100 females age 18 and over, there are 90.6 males.
The median income for a household in the town is $114,064, and the median income for a family is $125,867. Males have a median income of $93,953 versus $53,235 for females. The per capita income for the town is $50,773. 2.2% of the population and 1.3% of families are below the poverty line. Out of the total population, 1.6% of those under the age of 18 and 5.8% of those 65 and older are living below the poverty line.
Danville is named, in part, after Daniel Inman, who bought 400 acres (1.6 km2) there in 1854 with his brother Andrew, using their Gold Rush earnings. They rejected the name "Inmanville" and settled on Danville. However, "According to the modest Dan, the name was chosen as much or more out of respect for Andrew's mother-in-law, who was born and raised near Danville, Ky.," says one historical account. It was initially a farming community, switching from wheat to fruits and nuts after the Southern Pacific Railroad built a spur line through the area in 1891. It developed as a residential suburb starting in 1947, when the first sizeable housing tracts were constructed, and its population boomed in the 1970s and 1980s.