Open the Facebook app or go to https://www.facebook.com
Log in to your account
Tap your profile picture (or menu) and go to Settings & privacy
Tap Settings
Tap Accounts Center (or see “Personal details” then “Account ownership and control”)
Tap Deactivation or deletion
Select Delete account
Choose Continue to account deletion
Select a reason for deletion (if prompted)
Review the information and select Delete account
Enter your password and confirm deletion
If prompted, confirm the deletion by clicking Delete account again
Wait for the account deletion to complete (it may take up to 30 days)