A Windsor chair is a distinctive type of wooden chair in which the legs and back components are socketed directly into a solid wooden seat, rather than being constructed around a conventional framed back. Developed into one of the most recognisable forms of British vernacular furniture, Windsor chairs have been produced in numerous regional styles from the eighteenth century onwards.

The defining feature of Windsor construction is the solid, shaped seat, into which the legs are typically inserted from below and the back spindles or supports from above. This method creates a strong but relatively lightweight structure and distinguishes the Windsor chair from many other traditional chair forms.