He did receive honorary doctorates from:
* Grinnell College
* Purdue University
* University of Vermont
* University of Miami
* Hofstra University
* Brown University
These are honorary degrees, not awards for his writing.
However, his books have been hugely successful, and he has received numerous accolades, including:
* The Laura Ingalls Wilder Medal (1980) for his significant and lasting contribution to children's literature
* The Pulitzer Prize Special Citation (1984) for his contributions to American Literature.
It seems there is a misunderstanding! Dr. Seuss didn't win traditional awards, but he did receive other significant recognitions for his work.