William Montgomery House
U.S. National Register of Historic Places
Location	19–21 South Queen Street, Lancaster, Pennsylvania
Coordinates	40°2′14″N 76°18′19″W / 40.03722°N 76.30528°W / 40.03722; -76.30528
Built	1803
Architect	Stephen Hills
Architectural style	Federal
NRHP reference No.	00000519[1]
Added to NRHP	May 18, 2000

The William Montgomery House is an historic, American mansion that is located on South Queen Street in Lancaster, Pennsylvania, United States. Built in 1803, it was listed on the National Register of Historic Places on May 18, 2000.^[1]

It has been recognized as one of the best Federal-style buildings in Lancaster.^[2]

The William Montgomery House was designed by the architect Stephen Hills, who also designed the first Pennsylvania State Capitol building in 1803. It was owned by William Montgomery, a prominent, local attorney. Bought in 1960 by the next-door Watt & Shand department store, it was vacated after the store closed in 1995.^[2]

When the Lancaster County Convention Center was built during the late 2000s, the house was preserved externally and is a feature of the attached Lancaster Marriott's main lobby. In 2012, a project began to renovate the interior to convert it to high-end meeting spaces.^[3] The newly branded Montgomery Mansion is slated to open in November 2013.

• National Register of Historic Places listings in Lancaster, Pennsylvania

• 
  HABS photo of the house in 1965

Media related to William Montgomery House (Lancaster, Pennsylvania) at Wikimedia Commons