A station of the Butterfield Overland Mail was located about a mile south of Green Valley, on the San Francisquito Canyon Road, remained into the 1960s at 38839 San Francisquito Canyon Road. The building still stands, the building is believed to have been in use at the time the Butterfield stage line used this route from 1858 to 1861. The station was in existence by 1856, when Harris Newmark says he stayed there overnight when returning to Los Angeles from a meeting at Fort Tejon. This would have been Widow Smith's Station or Gordon's Station, 24 miles southeast from French John's Station and 10 miles north of King's Station located in the lower San Francisquito Canyon.
Geography
According to the United States Census Bureau, the CDP has a total area of 12.8 square miles, all of which is land. The town is located within San Francisquito Canyon and lies just a few miles northwest of the Bouquet Reservoir.
Businesses
Green Valley has a few small town businesses. These include a modern general store with gas station at the corner of Spunky Canyon and San Francisquito Canyon, the Heart N Soul Coffee House, which is also a cafe now operating with indoor and outdoor seating, located on San Francisquito Canyon, across the street from the Green Valley Market, another general store, called Backroads Market, which also has a gas station, located about a mile east of San Francisquito on Spunky Canyon, and Mortimer's Hardware, located near the original store.
Demographics
At the 2010 census Green Valley had a population of 1,027. The population density was 80.2 people per square mile. The racial makeup of Green Valley was 901 White, 81, 8 African American, 11 Native American, 12 Asian, 1 Pacific Islander, 35 from other races, and 59 from two or more races. Hispanic or Latino of any race were 123 people. The whole population lived in households, no one lived in non-institutionalized group quarters and no one was institutionalized. There were 443 households, 116 had children under the age of 18 living in them, 214 were married couples living together, 31 had a female householder with no husband present, 39 had a male householder with no wife present. There were 32 unmarried partnerships, and 3 same-sex married couples or partnerships. 129 households were one person and 29 had someone living alone who was 65 or older. The average household size was 2.32. There were 284 families ; the average family size was 2.81. The age distribution was 195 people under the age of 18, 71 people aged 18 to 24, 199 people aged 25 to 44, 429 people aged 45 to 64, and 133 people who were 65 or older. The median age was 47.0 years. For every 100 females, there were 113.5 males. For every 100 females age 18 and over, there were 111.7 males. There were 515 housing units at an average density of 40.2 per square mile, of the occupied units 359 were owner-occupied and 84 were rented. The homeowner vacancy rate was 4.5%; the rental vacancy rate was 2.3%. 862 people lived in owner-occupied housing units and 165 people lived in rental housing units. According to the United States Census Bureau, Green Valley has a median household income of $83,359, with 7.6% of the population living below the federal poverty line.
