This article describes a few ways to find the Gmail address of someone you want to contact.
How to Find Someone's Email Address in 10 Seconds
There are several ways to find out someone's Gmail address.
Try the easiest route first. That means finding the person in real life, via text or on social media and asking for their Gmail address. You can also try asking a mutual friend or coworker.
If the person whose address you want to find has contacted you through Gmail in the past, you may still have messages from them in your Inbox or one of your labels. To search for them, enter their name in the search bar at the top of your Gmail screen. If you have any messages from them, they will appear in a list. To reach them, you can reply to any of the messages.