Livermore (formerly Livermores, Livermore Ranch, and Nottingham) is a city in Alameda County. The population as of 2010 was 80,968. Livermore is located on the eastern edge of California's San Francisco Bay Area.
Traditionally, Livermore is considered the easternmost city in the Bay Area before entrance to the Central Valley. Livermore was founded by William Mendenhall and named after Robert Livermore, his friend and a local rancher who settled in the area in the 1830s. Livermore is the home of the Lawrence Livermore National Laboratory. Its south side, home to local vineyards, has developed several executive subdivisions near Ruby Hill. The city has also redeveloped its downtown district. The city is considered part of the Tri-Valley area, including Amador, Livermore and San Ramon Valleys.
Watercourses draining the city of Livermore include Arroyo Mocho, Arroyo del Valle, Arroyo Seco and Arroyo Las Positas. The principal aquifer underlying the city is the Mocho Subbasin. According to the United States Census Bureau, the city has a total area of 25.2 square miles (65.2 km²), over 99% of it land. Several local seismic areas of activity lie near the city including the Greenville Fault and the Tesla Fault.