- P. L. Kemble and Company ledger, 18661
- P. Vick & Co. Journal, 1860/18621
- P.D. Gwaltney & Co. Records, 1870/1940, bulk 1885/19301
- Page County ledgers, 1831/18811
- Painters Local Union, No. 91, Wheeling, Records, 1886/19581
- Papers regarding Early Settlers of Aurora in Preston County, 1788/1943, bulk 1820/19161
- Pardee and Curtin Lumber Company Records, 1889/19381
- Patrons of Husbandry, West Virginia University Grange, Records, 1891/19231
- Pauline Morehead Ash, Collector, Papers, 1855/19471
- Pendleton County Manuscripts and Account Books, 1802/19021
- Person Family papers, 1872/20021
- Peter Larew Papers, 1790/18921
- Peter Steenbergen, Ledger for Inn at Romney, Virginia, 1766/17751
- Peter T. Laishley Papers, 1809/19151
- Peter Winston Estate Account Book, 1784/17901