Pleasanton is a city in Alameda County, California, United States. Located in the Amador Valley, it is a suburb in the East Bay region of the San Francisco Bay Area. The population was 79,871 at the 2020 census. In 2005 and 2007, Pleasanton was ranked the wealthiest middle-sized city in the United States by the Census Bureau. Pleasanton is home to the headquarters of Safeway, Workday, Ellie Mae, Roche Molecular Diagnostics, Blackhawk Network Holdings, and Veeva Systems. Other major employers include Kaiser Permanente, Oracle and Macy's. Although Oakland is the Alameda County seat, a few county offices are located in Pleasanton. The Alameda County Fairgrounds are located in Pleasanton, where the county fair is held during the last week of June and the first week of July. Pleasanton Ridge Regional Park is located on the west side of town.
History
Alisal
Before the establishment of Pleasanton in the 1850s, an earlier settlement in the location was called Alisal. It was located on the lands of the Rancho Santa Rita near the site of a Native American ranchera, around the Francisco Solano Alviso Adobe called El Alisal (The Sycamores), one of the earliest houses built in the valley in 1844. It is still standing and serves as the centerpiece of the Alviso Adobe Community Park. Alisal, nicknamed "The Most Desperate Town in the West", was one of the settlements located along La Vereda del Monte that was a haunt and refuge of bandits and desperados in the era following the beginning of the California Gold Rush. Main Street shootouts were not uncommon. Banditos such as Claudio Feliz and Joaquin Murrieta ambushed prospectors on their way back from the gold rush fields and then sought refuge in Alisal. In the 1860s Procopio, Narciso Bojorques and others took refuge there. Alisal Elementary School reflects the city's original name.
Pleasanton
Pleasanton is located on the lands of the Rancho Valle de San José and Rancho Santa Rita Mexican land grants. Its name was chosen in the 1860s by John W. Kottinger, an Alameda County justice of the peace, after his friend, Union army cavalry Major General Alfred Pleasonton. A typographical error by a recording clerk in Washington, D.C., apparently led to the current spelling.
In 1917, Pleasanton was the backdrop for the film Rebecca of Sunnybrook Farm, starring Mary Pickford. The town was once home to Phoebe Apperson Hearst, who lived in a 50-room mansion on a estate, now the site of Castlewood Country Club.
Radum Plant was a sand and gravel plant opened in 1931 by Henry J. Kaiser Co., at Radum train station, one mile east of Pleasanton.
Geography
Pleasanton is adjacent to Hayward, Livermore, and Dublin. According to the United States Census Bureau, the city has a total area of , of which is land and (0.63%) is water. On the east side of town on Stanley Blvd. near the Livermore border is Shadow Cliffs Regional Park, a lake that permits swimming, fishing, and boating. On the west side is the Pleasanton Ridge with two parks, Pleasanton Ridge and Augustin Bernal Park. Much of Pleasanton is drained by the Arroyo Valle and Arroyo Mocho watercourses. Pleasanton lies along the route of the historic First transcontinental railroad.
Climate
Pleasanton features a Mediterranean climate, featuring hot, dry summers and mild to cool winters with occasional rainfall (Köppen climate classification Csa). The highest recorded temperature was 115 °F (46 °C) in 1950. The lowest recorded temperature was 17 °F (−8 °C) in 1990.
Demographics
2020
The 2020 United States Census reported that Pleasanton had a population of 79,871. The population density was . The racial makeup of Pleasanton was 47,058 (67.0%) White, 1,190 (1.7%) African American, 226 (0.3%) Native American, 16,322 (23.2%) Asian, 134 (0.2%) Pacific Islander, 2,002 (2.8%) from other races, and 3,353 (4.8%) from two or more races. Hispanic or Latino of any race were 7,264 persons (10.3%).
The Census reported that 69,829 people (99.4% of the population) lived in households, 320 (0.5%) lived in non-institutionalized group quarters, and 136 (0.2%) were institutionalized.