O`ROURKE James well digger Springdale Butler
O'BRIEN James machinist Main Karns City
O'BRIEN M of Hersh & O'Brien boards European hotel Millerstown  
O'BRIEN Simon helper boards Race Millerstown  
O'BRIEN HOUSE T J O'Brien proprietor Slippery Rock Millerstown  
O'CONNER John Main Greece City
O'CONNOR T bakery Main Millerstown  
ODELL C widow Franklin Butler
ODELL J A driller boards Adams house Fairview
ODELL W H contractor boards Adams house Fairview
O'DONNELL M J oil operator boards Central house Petrolia  
OESTERLING Fred of J OESTERLING & BRO Jefferson Butler
OESTERLING James of J OESTERLING & BRO boards Vogeley house Butler
OESTERLING J & BRO livery rear Vogeley house Butler
OETTINGER Frederick saddle and harness maker Main Millerstown  
OHL Adam Saxonburg
OLHMAN & KINGSBACHER   clothing Main Millerstown  
OLIVER Charles clerk Jamison Petrolia  
OLIVER George Portersville
OLIVER J E confectionery Main Petrolia  
OLSON John tailor North Butler
O'NEIL H F secretary Keystone Pipe Co boards Main Millerstown  
OPERA HOUSE HOTEL CLARK, Isaac proprietor Main Karns City
ORAND Miss Elizabeth tailoress boards Church Petrolia  
O'ROURKE Edward tool dresser boards Sherman house Millerstown  
O'ROURKE S F contractor boards O'Brien house Millerstown  
ORPHANS' HOME Millerstown road northwest Butler Butler
ORR Ann Eliza widow North Butler
ORR John P photographer east Jefferson, res. west North Butler
ORTON O teamster boards Apollo house Karns City
OSBORN B H oil dealer Franklin Butler
OSTERLING Peter Main Zelienople
OTT Joseph helper Mill Millerstown  
OTTERSTATLER J H book-keeper H & L Taylor & Co boards Wolcott's Petrolia  
OTTO   carpenter boards Monitor house Petrolia  
OTTO Christian west Cunningham Butler
OTTO Peter merchant Mercer Harmony
OTTO William laborer west Cunningham Butler
OUGHTON James Main Greece City
OVERY Joseph president Keystone Pipe Line Co residence McLaughlin farm Millerstown  
OXLEY W H clerk Main Petrolia