- Pee Dee District Dental Society Records, 1933-19881
- Periodic Reports to the Clemson University Board of Trustees23
- Philip Simmons Collection141
- Phillips Family Papers4
- Phillis Wheatley Community Center18
- Phillis Wheatley Literary and Social Club Papers9
- Phillis Wheatley's Poems on Various Subjects1
- Phosphate, Farms, & Family: The Donner Collection548
- Phosphates in South Carolina, 1870-189026
- Photographic Record of the Cooper River Bridge202
- Photos from the Records of The Historic Preservation Planner, BCD-COG985
- Piedmont Historical Society99
- Piedmont Image Collection480
- Pinckney Family Papers, 1703-18476
- Pinckney-Means Family Papers, 1701-19831
- Pincus Kolender Papers, circa 1915-199620
- Pinehurst Tea Plantation Visual Materials2
- Plantersville Oral Histories, 2019-202126
- Political Campaign Memorabilia Collection518
- Polychronicon, Translated1