Cloud region · AWS · North America
MON · 14 SEP 2026
US West (N. California)
About this region
US West (N. California) is a cloud region operated by AWS in San Francisco, United States. It is the region you select when you want compute, storage and managed services served from infrastructure physically located in or near San Francisco.
The region comprises 3 Availability Zones, each a separate physical facility with independent power, cooling and network paths. Workloads distributed across multiple AZs in the same region survive single-facility failures with millisecond-scale failover latency.
The region has been operational since 2009 (17 years).
Other cloud regions in San Francisco