Emeryville is a small city located in northwest Alameda County, California. It lies in a corridor between the cities of Berkeley and Oakland, with a border on the shore of San Francisco Bay. The resident population was 12,905 as of 2020.

Sunol is an unincorporated area and census-designated place in Alameda County, California. Located in the Sunol Valley of the East Bay, the population was 913 at the 2010 census. It is best known as the location of the Sunol Water Temple and for its historic tourist railroad system, the Niles Canyon Railway.

Castro Valley is a census-designated place in Alameda County, California. As of the 2010 census, it is the fifth most populous unincorporated area in California and the twenty-third most populous in the United States. The population was 66,441 at the 2020 census.

Livermore is a city in Alameda County, California. With a 2020 population of 87,955, Livermore is the most populous city in the Tri-Valley. It is located on the eastern edge of California's San Francisco Bay Area.

Pleasanton is a city in Alameda County, California. 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. The pedestrian-friendly, tree-lined streets of Downtown Pleasanton offer a vibrant blend of parks and historic buildings, specialty shops and service businesses, fine dining and coffee shops.

Dublin is a suburban city of the East Bay in California. It is located within the Amador Valley of Alameda County's Tri-Valley region. The population was 72,589 as of the 2020 census, which had grown from 46,063 in 2010.

Oakland is a major city in the San Francisco Bay Area of California, located on the east side of the bay. The city has a diverse population of over 430,000 people, making it the eighth-largest city in California. Oakland's 2019 population was at 429,082.

Ashland is a census-designated place (CDP) and unincorporated community in Alameda County, California, near San Leandro and Hayward. The population was 23,823 at the 2020 census. It is primarily a residential area with a mix of single-family homes, apartments, and townhouses.

Cherryland is an unincorporated community located in Alameda County, California, United States. It is situated between San Leandro and Hayward, just north of the unincorporated community of Ashland. Cherryland is a diverse community with a population of approximately 15,000 people as of the 2020 census.

Fairview is an unincorporated community located in Alameda County, California, United States. It is situated between Hayward and Pleasanton, just east of the city of San Leandro. Fairview is a small community with a population of approximately 10,000 people as of the 2020 census.