47 years old according to episode #152 premiered in Season 3- Quietest Day Ever.
Last time I checked, he was 47.
He is 50 years old as said on wikipedia.
His age is currently unknown.
47
16 Years old
Vanessa Doofenshmirtz is voiced by Olivia Olson
Roger Doofenshmirtz
He is a cute little 5 year old boy who will always defeat Dr. Heinz Doofenshmirtz.
Stay still!
I believe he is 47.
16 Years old
Between 40 and 50 years old
Charlene Doofenshmirtz
Vanessa Doofenshmirtz is the daughter of Heinz and Charlene Doofenshmirtz
Dr. Heinz Doofenshmirtz was created in 2007.
No Doofenshmirtz did not miss a episode on Phineas and Ferb.
NO katy perry did not date doofenshmirtz, and you know she didn't.
Vanessa Doofenshmirtz is voiced by Olivia Olson
There is no Sarah on Phineas and Ferb, but he has a mini crush on Vanessa Doofenshmirtz, Dr. Doofenshmirtz's daughter.
vanessa Doofenshmirtz
Roger Doofenshmirtz