You can delete your account from within WhatsApp. Deleting your account is an irreversible process, which we can't revert even if you perform it by accident.

To delete your account

1. Open WhatsApp.
2. Tap More options > Settings > Account > Delete my account.
3. Enter your phone number in full international format and tap DELETE MY ACCOUNT.
4. Select a reason for why you're deleting your account in the dropdown.
5. Tap DELETE MY ACCOUNT.

Deleting your account will

• Delete your account from WhatsApp.
• Erase your message history.
• Delete you from all of your WhatsApp groups.
• Delete your Google Drive backup.

If you delete your account:

• You can't regain access to your account.
• It might take up to 90 days to delete data stored in backup systems. Your information isn't accessible on WhatsApp during this time.
• It doesn't affect the information other users have related to you, such as their copies of the messages you sent them.
• Copies of some materials such as log records may remain in our database but are disassociated from personal identifiers.
• For legal purposes (e.g. to address fraud and other illegal activity), we may preserve your information. Please refer to the Law and Protection section of our Privacy Policy for more information.
• Your personal information shared with other Facebook Companies will also be deleted.

Learn how to delete your account on: iPhone | Windows Phone