Want to permanently delete your Facebook account due to some or other reason
I'll show you how to do it

In your Facebook account go to account settings where you will find security settings
In that security settings you will find a option Deactivate your account
which will deactivate the account temporary

If you are not sure about deactivating the account permanently go for temporary deactivation
when you plan to return back you just have to add you old email id n password and your account will get activate again

But if you have decided to permanently delete the account then follow the below steps

Step 1 - Go to account deactivation page http://goo.gl/9VnjP

Step 2 - Enter your email id and password on to that page

Step 3 - Follow the steps, such as entering your password, email, and CAPTCHA code.And click on submit

Step 4 - That's all don't login into the account again for 14 days and you account will b deleted permanently

Method 2

Step 1 - From your registered gmail account email privacy@facebook.com that that delete your facebook account
subject of the email will b Request

Step 2 - Wait for the email from the Facebook that your account has been permanently deleted

Step 3 - If you don't hear back from Facebook within a week, email them again. This time, not only email Facebook at privacy@facebook.com, but also cc support@facebook.com and info@facebook.com.

Step 4 - Attempt to log in to your account once you get an email from Facebook. If you're unable to log in and don't get a message asking you to reactivate your account, your Facebook account has been permanently deleted.
You may need to avoid logging in for 14 days for the deletion to go through.


Note - by permanently deleting your Facebook account you will lose the Facebook account for ever
It cannot be retrieve back
so thing twice for it if u wish to ...!

Enjoy....!!!!!!