Mount Joy, also known as the Peter Legaux Mansion, is an historic, American house that is located in the Spring Mill section of Whitemarsh Township, Montgomery County, Pennsylvania.

[1] Built circa 1735 by Anthony Morris for his son John,[2][3] this historic structure is a 2+1⁄2-story, five-bay, stone dwelling with a gambrel roof.

[2] Peter Legaux was the owner of "Spring Mill," a nearby gristmill that was in operation by 1704.

[3] Legaux also started the Pennsylvania Vine Company—which would become the first commercial vineyard in the US—on this property.

[4] Mount Joy was added to the National Register of Historic Places in 1971.