I want to know who accesses my Facebook profile. How can I get to know this?
The following page contains all accessible information pertaining to the accesses to your account: https://www.facebook.com/settings?tab=security
Facebook lists a set of security features to track and alert unauthorised access
One such is Login Notifications
We can notify you when your account is accessed from a computer or mobile device that you haven't used before. Choose a notification method below: