How many people had TVs when they first were invented?

The television was first demonstrated by John Logie Baird in March 1925. This was the first public demonstration and at that time the number of people that had televisions was precisely one person, Mr Baird.

In 1929, the BBC began television broadcasts and Baird sold several hundred televisions during the early years of television. The number were low because of the price. Today's equivalent would be in the region of £8000 ($12,000) so they were owned only by the wealthy.

The explosion in television ownership started around the mid 20th century when quality improved and costs went down.