4C

4C may refer to :


 * "4C" (Person of Interest), an episode of the TV series Person of Interest
 * 4C Array, a cylindrical paraboloid radio telescope at the Mullard Radio Astronomy Observatory
 * 4C Entity, a consortium to establish a platform for digital rights management schemes
 * Alfa Romeo 4C, a sports car
 * Fourth Cambridge Survey of Extra-Terrestrial Radio Sources
 * Cape Cod Community College (4Cs)
 * 4/C, a proposed supertall skyscraper in Seattle, Washington
 * LATAM Colombia, a Colombian airline IATA code
 * STD-4C, a classification of cluster mailboxes defined by the United States Postal Service
 * 4C, a grade of afro-textured hair in the Andre Walker Hair Typing System
 * 4C, the production code for the 1975 Doctor Who serial The Ark in Space
 * The 4 C's or marketing mix, a business tool used in marketing products
 * The 4 C's of 21st century skills education: Collaboration, Communication, Critical thinking, Creativity
 * FourCC, a four-character code used in software for identifying an object
 * Zen 4c