David M Willis (born April 3, 1979) is an American web cartoonist currently living in Columbus, Ohio. He is best known for his interconnected series of webcomics Roomies!, It's Walky!, Shortpacked!, and Dumbing of Age. Willis is also known online for his chatrooms and forums including "ItsWalky". KUTV in Salt Lake City calls him a satirist who is "a little bit edgy."

The shape-shifting robot franchise Transformers appears frequently in Willis' work. He was an administrator on Teletraan I, the Transformers Wiki from 2006 to 2008, when he facilitated a move from Wikia to its own site at tfwiki.net, remaining an administrator for the new site. Willis eventually became involved in official licensed Transformers artwork for Fun Publications' Transformers Collector's Club, particularly the regular club magazine feature Recordicons.

Previously featured at Keenspot with the comic of It's Walky! and the first months of Shortpacked!, Willis left to co-found Blank Label Comics in 2005. After Blank Label Comics was discontinued, he has continued his online presence at Shortpacked!, which has archives back to January 2005.

On September 19, 2008, Willis proposed to his girlfriend of four years, Maggie Weidner, in that day's episode of Shortpacked!. She accepted with a cartoon posted in the Shortpacked! blog. On September 21, 2009, Willis posted their wedding program. Their twin boys, Chase Alexander and Zachary Dashiel, were born on December 3, 2015.