I could not verify with Mandy Patinkin's agent that this address:

Mandy Patinkin
P.O. Box 5495
New York, NY 10185
USA

is any good.

I can't find a good address to send fan mail to Mandy Patinkin. I'm tempted to use his home address, but that might be considered rude. I guess he doesn't want fan mail.

This address is no longer any good. I can't find a good address to send fan mail.