California Data Centers

Live tracking of every data center project in California — operational, under construction, announced, and permitted — with developer, tenant, capacity, and supply-chain links.

California's tracked capacity is small and colocation-shaped: Equinix's SV18 (117 MW, announced) and SV12x (36 MW, under construction) in San Jose, and Vantage's 200 MW campus in Santa Clara. The largest row is PG&E's 2.26 GW Diablo Canyon nuclear plant, tracked for its AI-load integration, alongside the 40 MW El Capitan supercomputer at Lawrence Livermore.

Data Center Index tracks 15 named data center campuses in California (large sites with a source, not every building): 5 operating, 3 under construction, and 7 announced or permitted. The pipeline adds up to 1.4 GW of planned capacity. Below: every tracked project in California, ranked by build status, followed by the public companies whose data center revenue is most exposed to this market.

Tracked data center projects in California

Frequently asked questions

How many data centers are in California?
Data Center Index tracks 15 named data center campuses in California as of 2026: 5 operating, 3 under construction, and 7 announced or permitted. Coverage is named campuses with a published source, not every building.
How much data center capacity does California have?
356 MW is operating, with 1.4 GW in the announced and under-construction pipeline. 7 of the 15 California campuses carrying a capacity figure show an estimate rather than a figure a named source states, marked "est." on the site.
What is the largest data center in California?
Prologis San Jose Data Center & Advanced Manufacturing Campus (Zanker Road) in San Jose is the largest tracked campus in California at 396 MW, developed by Prologis. That capacity is stated by a named source.
Who is building data centers in California?
The most active developers in California by tracked campus count are Equinix (2 campuses), Vantage Data Centers (1 campus), Google (1 campus). Every campus page lists its developer, tenant and the source that names them.

Public companies exposed to California

These public companies have tracked data-center projects in California as developers, tenants, or operators. Use the watchlist to compare them side by side, or click through for capex history and supplier exposure.

Other data center markets

Tracked US markets, ranked by pipeline capacity: