Livermore is a city in Alameda County, California, in the United States. With a 2020 population of 87,955, Livermore is the most populous city in the Tri-Valley. Livermore is located on the eastern edge of California's San Francisco Bay Area. The current mayor is Bob Woerner.
Livermore was platted and registered on November 4, 1869, as a railroad town by William Mendenhall and named for Robert Livermore, his friend and a local rancher who settled in the area in the 1840s. Livermore is the home of the Lawrence Livermore National Laboratory, for which the chemical element livermorium is named. Livermore is also the California site of Sandia National Laboratories, which is headquartered in Albuquerque, New Mexico. Its south side is home to local vineyards. The city has redeveloped its downtown district and is considered part of the Tri-Valley area, comprising Amador, Livermore and San Ramon valleys.