Slater-Marietta is a census-designated place (CDP) in Greenville County, South Carolina, United States, along the North Saluda River. At the 2000 census, there were 2228 people. At the 2010 census, there were 2176. At the 2020 census, there were 1873. It is part of the Greenville–Mauldin–Easley Metropolitan Statistical Area.
J. Harvey Cleveland, born in 1815, invested in land in northern Greenville County, including a tract along the North Saluda River which he bought from his father-in-law about 1840. Cleveland expanded the simple home on the property and made it his family home. He also plotted a nearby settlement, named "Marietta" after his wife, Mary Louisa Williams.
Though in an otherwise favorable location, the resulting village was slow to grow, possibly because the only direct access to the area was via the dangerous Jones Gap Road. The CK&W rail line that became nicknamed the Swamp Rabbit was laid past Marietta in the lat