Runner's World is a globally circulated monthly magazine for runners of all skills sets, published by Hearst in Easton, Pennsylvania, in the United States. Before its acquisition by Hearst, it was founded and published by Rodale, Inc. in Emmaus, Pennsylvania.

Hearst Communications, Inc., often referred to simply as Hearst, is an American multinational mass media and business information conglomerate based in Hearst Tower in Midtown Manhattan in New York City.