Reverend Aaron Burt Grosh (May 22, 1803 – March 27, 1884), a Universalist minister, was one of the eight founders, and the first chaplain, of the National Grange of the Order of Patrons of Husbandry, a fraternal organization in the United States.

[1] He wrote a volume for members of the Grange to give them a better understanding of the organization and its teachings.

He also wrote the Odd Fellows Improved Manual for the same purpose.

The other founders of the Grange were Oliver Hudson Kelley, William Saunders, Francis M. McDowell, John Trimble, John R. Thompson, William M. Ireland and Caroline A.

[2] The United States National Agricultural Library is located in Beltsville, Maryland.