James Thomas Fields was an American publisher, editor, and poet. His business, Ticknor and Fields, was a notable publishing house in 19th century Boston.

Ticknor and Fields was an American publishing company based in Boston, Massachusetts. Founded as a bookstore in 1832, the business published many 19th-century American authors, including Ralph Waldo Emerson, Nathaniel Hawthorne, Henry James, Henry Wadsworth Longfellow, Harriet Beecher Stowe, Henry David Thoreau, and Mark Twain. It also became an early publisher of The Atlantic Monthly and North American Review.