All user-generated content is usually erased when your account is deleted, however, all log data is retained permanently. Your name will not be associated with the archived logs.
Delete your account by going to the Settings page through the downward-facing arrow at the top right corner of the site. Select Your Facebook Information from the drop-down menu, then go to the Delete Your Account and Information link.
Select the down arrow in the top right corner of Facebook. Select Settings Privacy from the drop-down menu. Then click Settings. In the left column, choose Your Facebook Information. Deactivation and deletion are two options you can choose from when you’re done with your account. Choose Permanently Delete Account and then Continue to Account Deletion.
Select your username from the drop-down menu in the upper right corner to access your profile. Scroll down a bit until you see a menu option appear in the left corner of your screen. Filter by month, date, and year. Next, tap on the three dots next to each post. Delete Confirm by clicking Yes.
Tap Encryption credentials and then Advanced in the left menu. If Encrypt phone isn’t already enabled, choose it. Then go to Settings System Advanced and select Reset options. Select Erase all data and press Delete all data.