Go to the Google Play Store. Type “Facebook” in the search bar. Select “Facebook” from the list of results and click on it. Click on “Uninstall” at the top right corner of your screen to remove Facebook from your device.
How to Delete Facebook Account Permanently
Go to SettingsClick on Apps or Application ManagerTap the Facebook app
Android phones do not allow you to delete the Facebook app.
To uninstall the Facebook app from your Samsung phone, go to your Apps list and find the Facebook app. Tap on it, then tap Uninstall.
To remove your Facebook account, go to https://www.facebook.com/help/?page=1175#delete_account and follow the instructions.
The easiest way to uninstall apps on Android is to use the Google Play Store. You can find this by tapping on the Apps icon on your home screen or by going into Settings and looking for it there. From the Google Play Store, tap the three vertical dots in the upper right-hand corner and select My Apps. This will show you a list of all of the apps you have installed on your phone, with an Uninstall button next to each one.
