How to delete your Instagram account
Step 1: Log in to your Instagram account — Head to the Instagram homepage and click the blue Log In button in the upper-right corner. Afterward, log in using your username and password before clicking the green Log In below the text fields. Alternatively, click the blue Forgot username link and follow the instructions if you’ve forgotten your necessary login credentials
Step 2: Access your profile settings — Click your username or profile picture in the upper-right corner of the homepage feed and select the Edit Profile option from the resulting drop-down menu.
Step 3: Delete your account — Click the blue I’d like to delete my account link in the bottom-right corner and select a reason for the cancellation from the drop-down menu on the following page. Next, retype your password in the appropriate text field and click the red Permanently deactivate my account button in the bottom-left corner of the page. Confirm the cancellation when prompted.