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 data centers are mostly smaller colocation campuses around San Jose and Santa Clara. Prologis has a 396 MW campus announced on Zanker Road in San Jose, Microsoft is building a 48 MW campus in Alviso, and STACK operates 48 MW in Santa Clara. Outside the Bay Area, the Golden Valley Technology Hub at Elk Hills (275 MW) and a 100 MW AI data center at Naval Air Station Lemoore are both in planning.

Data Center Index tracks 12 named data center campuses in California (large sites with a source, not every building): 3 operating, 3 under construction, and 6 announced or permitted. The pipeline adds up to 1.3 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 12 named data center campuses in California as of 2026: 3 operating, 3 under construction, and 6 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 1.3 GW in the announced and under-construction pipeline. Of the 12 California campuses with a capacity figure, 0 are filed, 8 stated and 4 estimated. Filed means a permit, utility filing or SEC filing states the figure. Stated means the developer or the press states it. Estimated means we modeled or inferred it, and the site marks it "est.". Filed and stated figures carry the date of the newest source behind them.
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. The developer or the press states that capacity, in a source dated September 12, 2026.
Who is building data centers in California?
Developers with a tracked campus in California include Vantage Data Centers, Google, STACK Infrastructure. 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: