Gmail contacts are stored automatically when you send an email to somebody, it also stores contacts or emails addresses that are typed wrongly by mistake.
You can easily delete the Gmail contacts that you do not want anymore.
Login to Gmail
Go to the contacts page by clicking on the Contacts link on the left side of your Gmail
Search and find the contact that you want to delete
Choose the contact and click the Delete contact button
You will find the Delete option under More actions tab. Once you delete the contact you will get a confirmation as below
Using the method above you can delete any Gmail contacts or email addresses in your address book.
If you have any questions or suggestions, please post a comment