| PAINTER | Byram | boards Central hotel | Millerstown | ||
| PAINTER | P A | agent Union Express Co | Main | Millerstown | |
| PALMER | B F | oil operator | boards Central hotel | Millerstown | |
| PAPE | D T | dry goods | Main | Butler | residence Jefferson |
| PARKER | J W | harness maker | North Washington | ||
| PARKER | James C | Harrisville | |||
| PARKER | Richard | teamster | boards Main | Karns City | |
| PARKER | William G | saloon and restaurant | corner Main and North | Butler | |
| PARKER & KARNS CITY | RAILROAD DEPOT | Railroad near Main | Petrolia | ||
| PARKER & KARNS CITY RAILROAD DEPOT | Railroad | Karns City | |||
| PARKISON | J | clerk | Mill | Millerstown | |
| PARTHRINE | W H | Main | Greece City | ||
| PASSAVANT | C S | merchant | Main | Zelienople | |
| PASSAVANT | P L | Main | Zelienople | ||
| PASSAVANT | Rev W A | Main | Zelienople | ||
| PATCH | H | of D Almas & Co | boards Boulger house | Petrolia | |
| PATCH | W M | boards Boulger house | Petrolia | ||
| PATCHEN | C K | contractor | boards European hotel | Millerstown | |
| PATTERSON | Asa Dr | physician | Main | Centreville | |
| PATTERSON | C M | Main | Greece City | ||
| PATTERSON | Cynthia | ||||
| PATTERSON | David | ||||
| PATTERSON | George W | driller | boards European hotel | Millerstown | |
| PATTERSON | J N | of HECK & PATTERSON | near south end Main | Butler | |
| PATTERSON | John | clothing store | Main | Millerstown | boards European hotel |
| PATTERSON | Lewis | Main | Centreville | ||
| PATTERSON | O | shoemaker | boards Jamison | Petrolia | |
| PATTERSON | Susan | widow | near south Main | Butler | |
| PATTON | A B | Harrisville | |||
| PATTON | J W | Main | Centreville | ||
| PATTON | Mary | widow | north McKean | Butler | |
| PATTON | Rev W D | Harrisville | |||
| PATTON | Robert | Main | Fairview | ||
| PATTON | Thomas | Main | Centreville | ||
| PAUL | John | valve cup maker | boards Jamison | Petrolia | |
| PAXSON | L W | Main | Centreville | ||
| PAYNE | Charles | hostler | boards Main | Millerstown | |
| PEARCE | Alfred | banker | Main | Harmony | |
| PEARCE | Austin | druggist | Mercer | Harmony | |
| PEARCE | John | woolen mill | Wood | Harmony | |
| PEARSON | B | physician | Main | Centreville | |
| PECK | C E | of Bell & Peck and H C Sanderson & Co | residence Green | Millerstown | |
| PECK | C N | agent United Pipe Lines | boards Central hotel | Millerstown | |
| PECK | Jacob | Harrisville | |||
| PECK | Seymour | book-keeper United Pipe Lines | boards Wolcott's | Petrolia | |
| PECK'S TORPEDO OFFICE | Jamison | Petrolia | |||
| PEFFER | T B | Main | Harmony | ||
| PEIRCE | C F | Boss Grocery | Slippery Rock | Millerstown | residence Mill |
| PEIRSOL | S H | attorney | corner E Diamond res Springdale | Butler | |
| PEN | Joseph S | Harrisville | |||
| PENNSYLVANIA TRANSPORTATION | COMPANY | William Warmcastle, superintendent | office Jamison | Petrolia | |
| PERCEY | Thomas | oil operator | boards Grand Central | Karns City | |
| PERCY | Thomas | contractor | boards Reiber house | Millerstown | |
| PERDUE | J T | oil dealer and producer | residence Central Point | Petrolia | |
| PERRY | John S | Harrisville | |||
| PERSONS | Lon | tool fisher | boards European hotel | Millerstown | |
| PETERS | J A | Main | Centreville | ||
| PETERS | T D | clerk | Fairview | Karns City | |
| PETERSON | Charles | shoemaker | Main | Karns City | |
| PETERSON | P O | wagon maker | Euclid ave | Karns City | residence Petrolia |
| PETROLIA HOSE COMPANY | HOUSE | Fairview | Petrolia | ||
| PETROLIA OIL EXCHANGE | C L Wheeler, president | H L McCance, vice pres; George Heard, secretary | cor Main and Railroad | Petrolia | |
| PETROLIA OPERA HOUSE | Main and Fairview | Petrolia | |||
| PETTIGREW | S | grocer | North Washington | ||
| PETTIGREW, S H & CO | druggist | Main | Karns City | ||
| PFAFF | John | teamster | Mill | Millerstown | |
| PFAFF | V | hostler | Green | Milerstown | |
| PFEIFFER | Peter | shoemaker | Evansburg | ||
| PHENICE | W H | carpenter | residence Fairview | Petrolia | |
| PHILIP | James M | Portersville | |||
| PHILIPS | J J | of Bush & Philips | Mill | Millerstown | |
| PHILIPS | R N R | reporter | boards European hotel | Millerstown | |
| PHILIPS | Sarah | widow | Penn | Butler | |
| PHILLIPS | George | Main | Zelienople | ||
| PHILLIPS | John H | Main | Zelienople | ||
| PHILLIPS | William | confectionery | Main | Karns City | |
| PIER | F R | operator | boards Slippery Rock | Millerstown | |
| PIERCE | R D | driller | boards Slippery Rock | Millerstown | |
| PILLOW | G C | clerk | west Butler | Butler | |
| PISTORIOUS | John | teamster | Elm | Butler | |
| PITTS | E H | helper | Fairview | Petrolia | |
| PITTS | William | hostler | Mill | Millerstown | |
| PLANTE | H | boots and shoes | Modoc | ||
| POFF | George | teamster | Mill | Millerstown | |
| POFF | John | teamster | Mill | Millerstown | |
| POFF | V G | hostler | Mill | Millerstown | |
| POFF | Valentine | laborer | Mill | Millerstown | |
| POHL | Rev A F W | pastor German Lutheran Church | head of Main | Millerstown | |
| POLLEY | John A | helper | Sunbury | Fairview | |
| POLLOCK | -------- | carpenter | Main | Fairview | |
| POLLOCK | B L | teacher | boards Finley house | Butler | |
| POLLOCK | James | Main | Greece City | ||
| POMEROY | Miss Mary | bording house | north Main | Butler | |
| PONTIOUS | Nicholas | dry goods, groceries, &c. | Brady | Buena Vista | |
| POOL | Roselle | teamster | Petrolia | Karns City | |
| PORTER | A | proprietor Forest house | Petrolia | ||
| PORTER | E W | manager Forest House | Petrolia | ||
| PORTER | George | oil operator | boards European hotel | Millerstown | |
| PORTER | George W | boards Forest house | Petrolia | ||
| PORTER | J | driller | boards Reiber house | Millerstown | |
| PORTER | J R | clerk | Main | Fairview | |
| PORTER | John | driller | boards Grand Central | Karns City | |
| POST OFFICE | R W Cram | postmaster | corner Main and Railroad | Petrolia | |
| POST OFFICE | William McGlaughlin | postmaster | Main | Millerstown | |
| POST OFFICE | Butler | Buena Vista | |||
| POST OFFICE | C C Alexander, postmaster | Main | Fairview | ||
| POSTOFFICE | west Cunningham | Butler | |||
| POTTS | Eli | north Main | Butler | ||
| POTTS | Joseph | north Main | Butler | ||
| POTTS | Levi | laborer | Springdale | Butler | |
| PREGENZER | D | wagon and carriage maker | Main | Middle Lancaster | |
| PRENTICE | F | of Prentice, Barbour & Co | residence New York | Millerstown | |
| PRENTICE, BARBOUR & CO | producers | office Slippery Rock | Millerstown | ||
| PREST | George D | dry goods | Main | Petrolia | |
| PRICE | A C | of Price & Locke | boards Parker house | Petrolia | |
| PRICE | Henry L | Main | Greece City | ||
| PRICE | John | tool dresser | Mill | Millerstown | |
| PRICE | Thomas | Main | Greece City | ||
| PRICE & LOCKE | machinists | Union | Petrolia | ||
| PRIER | John | teamster | corner Railroad and Union | Petrolia | |
| PRIME | Aaron | Main | Harmony | ||
| PRINGLE | George | drover | corner Bluff and Penn | Butler | |
| PRINGLE | H | clerk | boards Pringle's exchange | Butler | |
| PRINGLE | James R | hotel | opposite R R Depot | Butler | |
| PRINGLE | Joseph | Main | Greece City | ||
| PROCTOR | W E | of Proctor & Mainwaring | Sunbury | Fairview | |
| PROCTOR & MAINWARING | founders and machinists | Sunbury | Fairview | ||
| PROSSER | Abraham | shoemaker | Franklin | Centreville | |
| PROSSER | Charles | tailor | Main | Centreville | |
| PRUDEN | F | works Pipe Line | boards Grand Central | Karns City | |
| PUFF | William | laborer | Race | Butler | |
| PUGH | Edward E | of BURTNER & PUGH | east Jefferson | Butler | |
| PURDUE | W R | attorney | corner Main and Jamison | Petrolia | |
| PURDUM | R W | manager A & P telegraph office | boards Wolcott's | Petrolia | |
| PURVIANCE | C E | U S oil gauger | boards corner Bluff and Pearl | Butler | |
| PURVIANCE | C E, Jr | oil gauger | boards corner Bluff and Pearl | Butler | |
| PURVIANCE | F S | law student | boards north Main | Butler | |
| PURVIANCE | John N | attorney | south Main | Butler | residence Main |
| PURVIANCE | L K | attorney | corner Pearl and Bluff | Butler | |
| PURVIANCE | Louis K | attorney | south Main | Butler | residence Main |
| PURVIANCE | Samuel | dentist | boards Bateman's hotel | Karns City | |
| PURVIS | J L | of S G PURVIS & CO | residence east North | Butler | |
| PURVIS | L O | of S G PURVIS & CO | residence east North | Butler | |
| PURVIS | S D | carpenter | residence east North | Butler | |
| PURVIS | S G | of S G PURVIS & CO | residence east North | Butler | |
| PURVIS S G & CO | lumber dealers | Franklin, between Jeff. & North | Butler | ||
| PURVIS S G & CO | lumber yard and planing mill | Franklin | Butler |