The Santa Clara Depot was built by the SF&SJ circa 1864. It was served by the SPC after the 1886 merger with the SP. There is an onging debate about whether this is the oldest railroad station west of the Mississippi. The contenders are this building, the Menlo Park depot which is probably a year younger, and the Colma depot, age unknown, but possibly as early as 1863.
The SPC Agnew depot (original SPC 1877 or so) still stands at its original location and houses a model railroad layout. The nearby freight depot burned about 10 years ago
The SPC Alviso depot (original SPC 1877 or so) is still in Alviso, but has been moved away from the tracks. It is now a private home.
The SPC/SP "New" Felton freight depot (post 1880, built in part of salvaged flume boards)is located at its orignial location in Felton, as part of the Roaring Camp facilities.
As far as I know thats all thats left
Randy Hees