App Engine is regional, which means the infrastructure that runs your apps is located in a specific region and is managed by Google to be redundantly available across all the zones within that region.
Meeting your latency, availability, or durability requirements are primary factors for selecting the region where your app's are run. You can generally select the region nearest to your app's users but you should consider the location of the other Cloud Platform products and services that are utilized by your app. Using services across multiple locations can affect your app's latency as well as pricing.
App Engine is available in the following regions:
For information about selecting a region to create an App Engine application, see the Managing Projects, Applications, and Billing topic for your language in either the standard environment or flexible environment.