Single-family detached home
free-standing residential building
Octagon House
Octagon House
Octagon House
Octagon House
Octagon House
Octagon House
Octagon House
Oglebay Park
Olaf Lee House
Old Indiana County Jail and Sheriff's Office
Oliver Bronson House
Oliver G. Traphagen House
Osborn House
Oscar B. Balch House
Ossian H. Sweet House
Otis Putnam House
Our Mother of Mercy Catholic Church and Parsonage
Owen-Primm House
Owen-Cox House
Oxford House
Palm Cottage Gardens
Palmer Brothers Octagons
Pardee Home
Park Avenue Houses
Parker Cleaveland House
Parker House
Patsy Clark Mansion
Paul F. Murphy House
Paul Gibbs House
Paul J. and Ida Trier House
Paul Stock House
Peabody-Williams House
Pershing House
Bertha Eccles Community Art Center
Peter A. Beachy House
Peter Anderson House
Peter G. Thomson House
Peter J. Paulsen House
Peter Jeppesen House
Peters House
Philip Buehner House
Pickens House
Pierce and Walter Butler House
Pierre P. Ferry House
Pink House
Pipestone Indian School Superintendent's House
Pleasant Home
Plumb House
Pope Villa
Portland Club