Can I change my Gmail address without creating a new account?

Can I change my Gmail address without creating a new account?

First of all its not possible to change Gmail Email Address without creating new one. Once that new account is created with the desired username, you can set up forwarding from the old Gmail to the new Gmail and check all of your messages in one place.

Can I have 2 Gmail addresses?

You are allowed to have as many accounts as you want, and Gmail make it easy to simultaneously sign in to multiple accounts. If you have more than one Google Account, you can sign in to multiple accounts at once. That way, you can switch between accounts without signing out and back in again.