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- Robert Pack (born 1969) former NBA player, current assistant coach for the Los Angeles Clippers
- Stephen B. Packard Reconstruction politician
- Jonathan Papelbon (born 1980) closer for the Philadelphia Phillies
- John M. Parker (1863–1939) Governor of Louisiana (1920–1924
- Mary Evelyn Parker (born 1920) state treasurer from 1968 to 1987
- Edward Grady Partin (1924–1990) Teamsters Union business agent in Baton Rouge
- Otto Passman (1900–1988) US Representative
- David I. Patten (1920–1998) politician
- Carly Patterson (born 1988) Olympic gold medalist in gymnastics
- Jacob E. "Pat" Patterson (1924–2010) politician
- Benjamin Pavy (1874–1943) District judge, opponent of the Longs, father-in-law of Carl Weiss, M.D.
- John William Payne (1877–1933), Natchitoches Parish sheriff from 1914 to 1933
- Nicholas Payton (born 1973) musician
- Dave L. Pearce (1904–1984) politician
- Kevin Pearson (born 1959) politician
- William S. Peck, Jr. (1916–1987) politician
- William S. Peck, Sr. (1873–1946) politician
- Louis Pendleton (1931–2007) dentist and civil rights activist
- Morgan D. Peoples (1919–1998) historian
- Leander Perez (1891–1969) District judge, political boss of St. Bernard and Plaquemine parishes from 1919 to 1969
- Tony Perkins (born 1963), conservative politician, head of Family Research Council
- Pauley Perrette (born 1969) singer and actress
- Ryan Perrilloux (born 1987) quarterback for the New York Giants
- Jonathan W. Perry (born 1973) politician
- Tyler Perry (born 1969) Television and movie producer
- Andy Pettitte (born 1972), starting pitcher for the New York Yankees
- Rupert Peyton (1899–1982) politician, journalist, historian
- Marguerite Piazza (born 1926) operatic soprano
- Webb Pierce (1921–1991) singer
- Wendell Pierce (born 1962) actor, Bunk Moreland on The Wire
- Juan Pierre (born 1977), outfielder for the Philadelphia Phillies
- Gil Pinac (born 1951) politician
- P.B.S. Pinchback (1837–1921) politician, Governor of Louisiana
- Leonidas Polk (1806–1864) Confederate general, Episcopal bishop, founder of Sewanee, The University of the South
- Erich Ponti (born 1965), politician
- Tracy Porter (born 1986), cornerback for the Denver Broncos
- Bryan A. Poston (1924–2009) politician
- Charles M. Poston, Sr. (1898–1968) politician
- Henry "Tank" Powell (born 1945), politician
- A. T. Powers (1896–1975), clergyman
- Julien de Lallande Poydras (1740–1824) poet, politician
- Steve Prator (born c. 1951), Caddo Parish sheriff
- Fred Preaus (1912–1987) state highway director from 1952 to 1955, 1956 gubernatorial candidate
- Edwin G. Preis (1916–2011), politician
- Phil Preis (born 1950), politician
- Sister Helen Prejean (born 1938) activist
- O. E. Price (1924–2006) judge
- Louis Prima (1910–1978) musician, entertainer
- Professor Longhair (1918–1980) musician
- Paul Prudhomme (born 1940) chef
- Robert G. Pugh (1924–2007) Shreveport lawyer, gubernatorial advisor
- Stephen E. "Steve" Pugh (born 1961) politician
Read more about this topic: List Of People From Louisiana