Open the Settings app on your Android device
Tap Passwords & accounts, Accounts, or Users & accounts
Select the Google account you want to remove
Tap Remove account
Confirm by tapping Remove account again
If prompted, enter your PIN, pattern, or password
To delete the Gmail account permanently, go to myaccount.google.com
Sign in to the Gmail account you want to delete
Tap Data & privacy
Scroll to More options
Tap Delete your Google Account
Follow the on-screen steps to confirm deletion