Pioneer Courthouse

	Pioneer Courthouse
	U.S. National Register of Historic Places
	U.S. National Historic Landmark
	Portland Historic Landmark
	The Pioneer Courthouse as viewed from Pioneer Courthouse Square after 2005 renovations.
	Location within downtown Portland Pioneer Courthouse (Oregon) Pioneer Courthouse (the United States)
Location	700 SW 6th Avenue; Portland, Oregon
Coordinates	45°31′07″N 122°40′42″W / 45.518624°N 122.678360°W
Built	1869
Architect	Alfred B. Mullett
Architectural style	Italianate
NRHP reference No.	73001582
Significant dates
Added to NRHP	March 20, 1973
Designated NHL	May 5, 1977

The Pioneer Courthouse is a federal courthouse in Portland, Oregon, United States. Built beginning in 1869, the structure is the oldest federal building in the Pacific Northwest, and the second-oldest west of the Mississippi River.^[4] Along with Pioneer Courthouse Square, it serves as the center of downtown Portland. It is also known as the Pioneer Post Office because a popular downtown Portland post office was, until 2005, located inside. The courthouse is one of four primary locations where the United States Court of Appeals for the Ninth Circuit hears oral arguments. It also houses the chambers of the Portland-based judges on the Ninth Circuit.

^ Portland Historic Landmarks Commission (July 2010), Historic Landmarks -- Portland, Oregon (XLS), retrieved November 13, 2013.
^ "National Register Information System". National Register of Historic Places. National Park Service. January 23, 2007.
^ "Pioneer Courthouse". National Historic Landmark summary listing. National Park Service. Archived from the original on December 10, 2007. Retrieved November 19, 2007.
^ "Pioneer courthouse's bare earth will soon sprout native plants". The Oregonian. October 12, 2006. Archived from the original on November 10, 2006. Retrieved January 21, 2007.