Roberta Gregory (born 1953 in Los Angeles, California) is an American comic book writer and artist best known for her character Bitchy Bitch from her Fantagraphics Books series Naughty Bits.
Gregory's father was Disney comics artist Bob Gregory. Educated at the California State University, Long Beach, she began her career by publishing comics in the influential all-female Wimmen's Comix anthologies and in other '70s underground comix, and created the strip Feminist Funnies.
Bitchy Bitch, who debuted in 1989, is Midge McCracken, a woman angry at the world who frequently explodes with rage. Gregory told stories from all parts of Bitchy's life (including one set in the Middle Ages) in the 40-issue series Naughty Bits. Bitchy Bitch's lesbian counterpart is Bitchy Butch. Starting in 1999, Bitchy Bitch was featured in an animated series shown on the Oxygen Network in the U.S. and on the Comedy Network in Canada. 
Gregory's other work includes the fantasy graphic novel Winging It, the 3-issue series Artistic Licentiousness, and the comic strip Sheila and the Unicorn.
Gregory has contributed to a number of comic anthologies, including Robert Kirby's Strange Looking Exile. As well, she is one of the contributors to Free to Fight, the interactive self defense project for women. Gregory has received several Eisner Award nominations in the humor, best short story, best writer, and best writer/artist categories. In 1994 she was given an Inkpot Award by Comic-Con International.