Samuel Stehman Haldeman (August 12, 1812 - September 10, 1880), American naturalist and philologist, was born at Locust Grove, Pennsylvania .

He was educated at Dickinson College, and in 1851 was appointed professor of the natural sciences in the university of Pennsylvania. In 1855 he went to Delaware College , where he filled the same position, but in 1869 he returned to the university of Pennsylvania as professor of comparative philology and remained there till his death, which occurred at Chickies, Pennsylvania .

His writings include:

• Freshwater Univalve Molliesca of the United States (1840)
• Zoological Contributions (1842-1843)
• Analytic Orthography (1860)
• Tours of a Chess Knight (1864)
• Pennsylvania Dutch, a Dialect of South German with an Infusion of English (1872)
• Outlines of Etymology (1877)
• Word-Building (1881).