David F. Walker is an American comic book writer and novelist. He is known for creating the fictional DC Universe character Naomi McDuffie, who is the main character of The CW series Naomi. He also created the independent comic book series Bitter Root.

Naomi McDuffie, also known as Powerhouse, is a fictional superhero appearing in comic books published by DC Comics. The character was created by the writer Brian Michael Bendis for his Wonder Comics imprint, along with writer David F. Walker and artist Jamal Campbell. The character's name is, in part, a tribute to comic book writer and creator Dwayne McDuffie.