Finding hacker

Someone is logging in using my email addresses and passwords. I find my settings changed, my notes deleted, my photos gone., and it says MY login isn't recognized. One time an entire user ID was deleted: I tried to log in and it wasn't there. Lately I'm turning on my phone and find it's already logged in to a certain address.

I always use this phone. Is there any way to find out where he's logging in from? I'm sure it's the same city but the company might tip me off since my company provides log addresses from other cities so city is no help.