Greenleaf (short story), a short story by Flannery O'Connor

John Greenleaf Whittier (1807 – 1892), American Quaker poet

Legolas, a character of The Lord of the Rings by J. R. R. Tolkien, whose name is translated as "Greenleaf"

Robert K. Greenleaf (1904 – 1990), founder of the modern Servant leadership movement

Simon Greenleaf (1783 – 1853), American jurist

Greenleaf Township, Minnesota

Green Leaf, a common name for Trichoglossus chlorolepidotus Australian loriqeet

Ralph Greenleaf (1899 – 1950), American pocket billiard champion

Greenleaf, Idaho

William Greenleaf Eliot (1811 – 1887), American educator

Ezra Greenleaf Weld (1801 – 1874), American photographer, often known simply as "Greenleaf"

Greenleaf, Kansas

Greenleaf Whittier Pickard (1877 – 1956), American radio pioneer

Greenleaf Township, Michigan

Halbert S. Greenleaf (1827 – 1906), U.S. Representative

Cat Greenleaf, American TV reporter

Greenleaf manzanita, a North American shrub

Greenleafton, Minnesota

John Greenleaf Adams (1810 – 1897), American hymnwriter

Greenleaf State Park

Greenleaf, Wisconsin

Greenleaf (automobile), American automobile produced in 1900s