The Clayton Post Office
The Clayton Post Office, established on October 4, 1861, is one of the oldest post offices in continuous operation in California. Ensuring its continuation in Clayton was one reason for incorporating the city in 1964.
During the past 140 years, the post office served from various locations in Clayton. The post office building on this site opened June 4, 2001.
Clayton Historical Society, 2001
Marker is on Center Street west of Marsh Creek Road, on the right when traveling east.
Courtesy hmdb.org
