Tibor de Scitovsky, also known as Tibor Scitovsky (November 3, 1910 – June 1, 2002), was a Hungarian-born, American economist best known for his writing on the nature of people's happiness in relation to consumption.

As the de indicates, he was born into a noble family; his father, Tibor Scitovszky, held the post of Foreign Minister.

Because he still had family in German-allied Hungary, he changed his name during this time to Thomas Dennis.

After a spell at Stanford from 1946–1958, he left for Berkeley and remained there until 1968, although he was on leave to do research at the Organisation for Economic Co-operation and Development.

Starting as early as 1959, he began an examination of the nature of human well-being from a broader viewpoint than is customary among economists.