Mercer County

US States / O-U / Pennsylvania / Mercer County

Mercer County is named for Hugh Mercer, who was a soldier and physicians and who died at the Battle of Princeton during the American Revolutionary War.


Created:  March 12, 1800

County Seat:

Mercer  1800 – present


County Courthouse – Mercer  


Location:  100 North Diamond Street / North Erie Street

Built:  1909 – 1911

Style:  Classical Revival

Architect:  Charles F Owsley of Owsley and Boucherle of Youngstown, Ohio

Contractor:  Luyster and Lowe of Dayton, Ohio


Description:  The building faces north and is a three story red colored brick and light gray colored sandstone structure. The building sits on a small hill. The north front and south side have large porticos supported by four high columns supporting a pediment at the roof line. The east and west side have small porches. There is a wide horizontal cornice running below the flat roof line. On the center of the roof is a high octagonal dome with clock and small cupola at the top.


Note:  The cost of construction of the courthouse was $490,000. The courthouse in Mahoning County, Ohio, is a similar type of building as Charles F Owsley was the architect for both buildings.



N - Crawford County

E – Venango County and Butler County

S – Lawrence County

W – Trumbull County, Ohio


























 Photos taken 2010