Lancaster County Courthouse is a historic courthouse building located at Lancaster, Lancaster County, Pennsylvania. The original building was built between 1852 and 1855. The original building was designed by Philadelphia architect Samuel Sloan (1815–1884). The north wing was added between 1896 and 1898, and low flanking wings on either side of the exterior staircase were added in 1926-1927. These later additions were designed by Lancaster architects James H. Warner and C. Emlen Urban, respectively. It is an important example of the Romanesque Revival style.It was added to the National Register of Historic Places in 1978. It is a contributing property to the Lancaster Historic District.
