Reddit reviews 2014 Artist's & Graphic Designer's Market

Its not that simple. There are thousands so you must do your homework. First, out of those thousands, you must determine which ones are accepting artist's submissions. A good starting place is the Artists & Graphic Designers Market. It's published annually, and includes complete, up-to-date contact information for more than 1,700 art market resources, including galleries, magazines, book publishers, greeting card companies, ad agencies, syndicates, art fairs and more.