Alden Richardson Carter was born April 7, 1947, in Eau Claire, Wisconsin, to John Kelley Carter and Hilda Richardson Carter (Fletcher). Graduating from Eau Claire Memorial High School in 1965, Carter continued his education with a Navy ROTC scholarship at the University of Kansas, earning a bachelors degree in English and humanities. He graduated in 1969 and went into the Navy as an officer for the next five years. In 1974, after his stint in the Navy, Carter married Carol Shadis, whom he had met nine years before. As Carter says, “we were in love almost from the first.” Carter went on to earn his teaching certificate from Montana State University, then taught English and journalism in Marshfield, Wisconsin.

Carter had known since he was eight that he wanted to write; he also knew that he was not finding the necessary time to write as a teacher. So, in 1980 with the support of his wife, Carter quit his job and began writing full-time. Growing Season was published by Coward-McCann in 1984 and was named an ALA Best Book for Young Adults.

Carter's mother Hilda Carter Fletcher has been his “first editor” for most of his books and her comments appear on many of the manuscripts throughout the collection. His literary agent encouraged him to write young adult nonfiction between fiction books. He coauthored his first nonfiction book, "Supercomputers," with his brother-in-law, Wayne LeBlanc, with whom Carter also wrote his second nonfiction book, "Modern Electronics." Carter continued writing young-adult fiction as well. "Wart, Son of Toad" (1985), "Sheila's Dying" (1987), and "Up Country" (1989) were all named ALA Best Books and "Robodad" (1990) (later reissued as "Dancing on Dark Water" (1993)) was named Best Children's Fiction Book of the Year by the Society of Midland Authors. Carter's nonfiction subjects range from China and the Revolutionary War, to computers and radios. His books have won a variety of awards.

Carter has been a resident of Marshfield, Wisconsin, since 1976. He and his wife have two children, Brian Patrick Shadis Carter (born 1983) and Siri Morgan Shadis Carter (born 1987). Carter's hobbies include travel, reading, canoeing, and outdoor activities, especially in Wisconsin.