George Westinghouse Jones House, also known by the Welsh name of Caermarthen, is a historic home located in the Town of Niskayuna in Schenectady County, New York.

It was built about 1900 and designed by the architectural firm of Rutan & Russell.

It is a rambling, 2+1⁄2-story gable-roofed frame residence in the Shingle Style.

it features a high stone foundation, steeply pitched gable roof, a wraparound verandah, hipped roof dormers, and five tall brick chimneys.

Its original owner was George Westinghouse Jones, who was a cousin of industrialist George Westinghouse and business administrator for the firm's Schenectady interests.