How to Hide Your Email on Facebook
1 – Log in to your Facebook account and visit your About page.
2 – In the left-hand column, click Contact and Basic Info.
3 – Hover your mouse over the Email field, then click the Edit button after it pops up.
4 – Click the first down arrow to the right of the email address that you use to log in to Facebook, then select Only Me.
5 – Next, click the down arrow on the far right and select Hidden from Timeline.
6 – Repeat steps 4 and 5 for any other email addresses that you wish to hide.
7 – Click Save changes.