As of the census of 2000, there were 70,708 people, 31,242 households, and 15,902 families residing in the city. The population density was 2,263.7/km² (5,861.4/mi²). There were 32,432 housing units at an average density of 1,038.3/km² (2,688.5/mi²). The racial makeup of the city was 63.77% White, 2.53% African American, 0.39% Native American, 20.67% Asian, 0.26% Pacific Islander, 8.32% from other races, and 4.07% from two or more races. Hispanic or Latino of any race were 18.26% of the population.
There were 31,242 households out of which 23.3% had children under the age of 18 living with them, 40.0% were married couples living together, 7.3% had a female householder with no husband present, and 49.1% were non-families. 35.6% 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 2.25 and the average family size was 2.97.
In the city the population was spread out with 18.0% under the age of 18, 8.3% from 18 to 24, 43.4% from 25 to 44, 19.8% from 45 to 64, and 10.5% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 106.8 males. For every 100 females age 18 and over, there were 106.9 males.
According to a 2007 estimate the median income for a household in the city was $82,648, and the median income for a family was $105,079.[4] Males had a median income of $64,585 versus $44,358 for females. The per capita income for the city was $39,693. About 3.6% of families and 6.8% of the population were below the poverty line, including 7.2% of those under age 18 and 5.9% of those age 65 or over.
Mountain View is served by the Caltrain rail system, which runs from San Francisco to Gilroy. It also served by the Santa Clara Valley Transportation Authority, including various bus lines and the Mountain View - Winchester light rail line.
Moffett Federal Airfield is located just north of Mountain View, but its use is restricted to aeromedical, government and military users. The nearest major airports are Norman Y. Mineta San Jose International Airport (SJC) and San Francisco International Airport (SFO). The nearest general aviation airport is the Palo Alto Airport of Santa Clara County.