Log in to Facebook on a desktop: Visit Facebook and sign in.
To access settings, click the picture of your profile in the upper right corner.
Choose Settings > Settings & privacy.
Go to Account Settings:
On the menu on the left,
select Your Facebook Information.
Delete or deactivate:
Press the Deactivation and Deletion button.
Choose Deletion:
Click Proceed to Account Deletion after selecting Delete Account.
Verify the deletion:
Enter your password and confirm your selection by following the instructions.
On a mobile application
Launch the Facebook app and sign in if you haven’t previously.
Open Settings:
In the top right (Android) or bottom right (iOS), tap the three horizontal lines (menu).
Choose Settings & Privacy > Settings by scrolling down.
Your Facebook details:
Select Deactivation and Deletion under Access and Control.
Choose Deletion: Select “Delete Account” and adhere to the guidelines.