George Ade House, Tudor Revival house in Iroquois Township, Indiana, US.

George Ade House, also called Hazelden, is a two-story, fourteen-room Tudor Revival home in Iroquois Township, Newton County, Indiana. Chicago architect Billie Mann designed the frame dwelling, built in 1904 at an estimated cost of $25,000. Its upper floor has half-timbering and stucco, and the interior features leaded glass windows and beamed and vaulted ceilings.

George Ade had his brother William buy 417 wooded acres along the Iroquois River near Brook in 1902, and the house was finished in 1904 at a cost of about $25,000. Ade lived there until his death in 1944, after which Purdue University received it; the state and then Newton County took it over when upkeep proved too costly. The George Ade Memorial Association restored it, and it joined the National Register of Historic Places in 1976.

Ade named the estate Hazelden after his English grandparents' home. He used it for political gatherings and community events: in 1908 William Howard Taft announced his presidential candidacy there, in 1912 a rally backed Theodore Roosevelt's Bull Moose Party, and in 1924 vice presidential candidate Charles W. Dawes spoke. On July 4, 1919, Ade hosted a homecoming for returning soldiers and sailors.

The house stands along the Iroquois River near the town of Brook in Iroquois Township, Newton County, reached by rural roads and best by car. As of 2019 Newton County officials were assessing its condition and plans to restore it as a historic site open to the public and an events venue, so access is not yet assured.

The original estate was named Hazelden, after the English ancestral home of Ade's grandparents. The property included unexpected features such as a swimming pool, greenhouse, and golf course laid out in 1910, making it a place of leisure beyond the main house.