Centennial is a novel by American author James A. Michener, published in 1974. It traces the history of the plains of north-east Colorado from prehistory until the mid-1970s. Geographic details about the fictional town of Centennial and its surroundings indicate that the region is in modern Weld County.

James Albert Michener was an American writer. He wrote more than 40 books, most of which were long, fictional family sagas covering the lives of many generations, set in particular geographic locales and incorporating detailed history. Many of his works were bestsellers and were chosen by the Book of the Month Club. He was also known for the meticulous research that went into his books.