Lorenza Haynes (April 15, 1820 – June 6, 1899) was an American librarian, minister, school founder, suffragist, and writer. Hayne began her early career as a teacher, working at schools in Lonsdale, Rhode Island, as well as Leicester and Lowell, Massachusetts. In 1854, she opened a private school in Rochester, New York, and from 1856 through 1860, was the principal of a young women's seminary there. Ill health forced a temporary retirement of four years, after which she served six years as the first librarian of the Waltham, Massachusetts Public Library. During this period, she became intimate with the Rev. Olympia Brown and Mary A. Livermore. In 1872, after retiring from the library, she entered St. Lawrence University, Canton, New York, and before completing the course there, was called