Leonard John Nuttall Sr. (July 6, 1834 – February 23, 1905) was a private secretary for John Taylor and Wilford Woodruff, and was a member of the Council of Fifty who kept a detailed journal of the early history of the Church of Jesus Christ of Latter-day Saints (LDS Church).

Nuttall was born in Liverpool, England and emigrated to Utah Territory in 1852 after converting to the LDS Church.

Starting in 1897, he served as a member of the General Board of the Deseret Sunday School Union.

In 1879, Nuttall became a private secretary for John Taylor, replacing George Reynolds, who was serving a prison term for practicing plural marriage.

For several years starting in 1880 Nuttall was a member of the University of Deseret board of regents.