Organised by Spike TV, the event recognises outstanding achievement in science fiction, fantasy, horror and comic books.
Johns was named as 'Best Comic Book Writer' for his work on the DC titles Blackest Night, Brightest Day, The Flash and Green Lantern.
Image's Walking Dead emerged victorious in the 'Best Comic Book Or Graphic Novel' category. Series writer Robert Kirkman was on hand to accept the gong.
Critically-acclaimed author Ray Bradbury received the 2010 'Comic-Con Icon Award' for lifetime achievement during the event.
The ceremony took place in Los Angles last Saturday. It will be broadcast on October 19 at 9pm EST/PST on Spike TV.