Bailey, Liberty Hyde (1858–1954), a United States botanist and horticulturist. He pioneered in establishing college extension courses for farmers and wrote authoritative works on horticulture. Bailey was born in South Haven, Michigan. He graduated in 1882 from what is now Michigan State University. He was professor of horticulture there, 1884–88, and at Cornell University, 1888–1903. From 1903 until 1913 Bailey was dean of Cornell's agricultural college. He retired in 1913.

Bailey's writings include: Cyclopedia of American Agriculture (4 volumes, 1907–09); The Standard Cyclopedia of Horticulture (6 volumes, 1914–17; 3 volumes, 1925; revised 1928); Hortus (1930, revised 1935); and Hortus Second (1941).