If you are authorized to do so, you can search for users in your region on the Users List.
Accessed through the main menu by clicking Setup and, in the list, Users, the Users List page allows you to search by name. Alternatively, you can filter people on the list by selecting whether they are active or inactive, or belong to a Resource Group, Notification Status, Role, or Resource Type. You can also reorder users in the list by clicking any column header.