William N. Thompson House, Georgian Revival mansion in North Meridian Street Historic District, Indianapolis, United States.

The William N. Thompson House is a two-story, five-bay central section flanked by one-story wings, built of buff-colored brick in Georgian Revival style. It has a slate hipped roof, a full-width front porch, and an elliptical portico at the main entry. It stands within the North Meridian Street Historic District in Indianapolis.

The William N. Thompson House was built in 1920 as a Georgian Revival brick mansion. From 1945 to 1970 it served as Indiana's Governor's Mansion, the official residence of the state's governors. It was added to the National Register of Historic Places in 1982 and is a contributing property in the North Meridian Street Historic District.

The house is known locally as the Old Governor's Mansion, a name it earned during its 1945-1970 service as Indiana's official governor's residence. It later became a contributing property to the North Meridian Street Historic District, so its brickwork and roofline are read as part of a street-wide collection of early 20th-century houses.

The property sits in the North Meridian Street Historic District and is protected by the Meridian Street Preservation Commission, which oversees its original features. Visitors should note this is private property best viewed from the street to appreciate its exterior design.

The house is a contributing property to the North Meridian Street Historic District, listed on the National Register of Historic Places in 1982. Its 1920 construction date places it among the early 20th-century mansions that line this Indianapolis boulevard.