Website address: https://www.grubhub.com/
Phone Number: 1-877-585-1085
Email/contact form: https://www.grubhub.com/help/contact-us
Facebook page: https://www.facebook.com/grubhub
Twitter account: https://twitter.com/grubhub
Mailing address: Grubhub, Inc., 111 W. Washington St, Suite 2100, Chicago, IL 60602