You can delete your WhatsApp account in a few simple steps.
Just know doing this will delete all information related to your account, including your profile photo, participation in WhatsApp groups, and all message history.
The “Settings” button is the tiny gear icon on bottom right corner of the screen. Once in settings, tap “Account.”
Then tap “Delete My Account”
After doing this, you have one more step.
Enter your phone number
When you click “Delete My Account,” a prompt will appear asking you to enter your phone number. Enter your number, then tap “Delete My Account” in red.
This is the final step in deleting your WhatsApp account.