Caroline Maria Hewins (October 10, 1846 – November 4, 1926) was an American librarian. American Libraries includes Caroline Hewins as one of the 100 Most Important Leaders we had in the 20th Century for her work as a librarian, where she is noted for her contributions to children's library services She was a librarian at the Hartford Young Men's Institute, which is now known as the Hartford Public Library in Hartford, Connecticut for more than fifty years. An author as well as librarian, she contributed not only to the expansion of children's library services across the U.S., but also the expansion of her library's membership, as well as its transformation from a subscription library to a free public library.