The T.U. Lyon House is a historic house at 9 Warren Street in Stoneham, Massachusetts. The modest 1+1⁄2-story Greek Revival house was built c. 1850 for T.U. Lyon, a shoe cutter. At the time of its construction Warren Street had been supplanted as the major north–south road through Stoneham by the Medford-Andover Turnpike (now Main Street, Massachusetts Route 28). Most of its distinctive Greek Revival features, including corner pilasters and a larger-than-typical frieze, have been lost due to recent residing of the exterior (see photo).

The house was listed on the National Register of Historic Places in 1984.

• National Register of Historic Places listings in Stoneham, Massachusetts
• National Register of Historic Places listings in Middlesex County, Massachusetts