Emergency Crime Scene and Biohazard Cleanup in Alamo, CA

Alamo is an unincorporated census-designated place in Contra Costa County whose name is the Spanish word for 'poplar tree.'

Alamo had 15,314 residents at the 2020 census, up from 14,570 in 2010, living in 5,392 households across about 9.7 square miles at the northern end of the San Ramon Valley.

Alamo is one of the wealthiest communities in America: the Census Bureau estimated its median household income at more than $250,000 in 2023, and about 91 percent of its occupied homes are owner-occupied.

Alamo's land was part of the 1833 Mexican land grant Rancho San Ramon, and its northern half belonged to grantee Mariano Castro.

Alamo's post office, established in 1852 with pioneer John Jones as the first postmaster, is the oldest continuously operated post office in the valley.

In 1873 Alamo pioneer Myron Hall grafted Persian walnut cuttings onto native walnut trees and helped launch Contra Costa County's walnut industry; his 'mother tree' was tended for more than 100 years.

Alamo residents have repeatedly voted down becoming a city, rejecting Alamo-Danville incorporation in 1964, an Alamo-Danville-San Ramon merger in 1976, and a standalone incorporation measure in a March 2009 referendum.

Alamo's 16.3-acre Hap Magee Ranch Park, shared with neighboring Danville, was Camp Swain, a summer camp that hosted San Francisco orphans from 1911 to 1952, before becoming a longhorn cattle ranch.

Alamo's neighborhood parks include the 4.4-acre Livorna Park, known for its gazebo and bocce court, and the one-acre Andrew H. Young Park, while the 5,342-acre Las Trampas Regional Wilderness rises immediately to the southwest.

Mount Diablo, at 3,864 feet, towers a few miles east of Alamo, and the Iron Horse Regional Trail runs through the community.