The figures also reveal that there are more than 900,000 households with a free satellite TV service in the UK.
The "Communications Market: Digital Progress Report" for the second quarter of 2008 shows that about 840,000 homes were using free satellite - from BSkyB, BBC/ITV or other retailers - on their main television set.
This was an increase of about 120,000 on the previous quarter. In addition, between June and September, BBC/ITV freesat sold a further 60,000 units, meaning that the total number of households using a free satellite service is now about 900,000.
The report shows that 88% of UK households now have some form of digital TV on their main set. The second quarter of 2008 saw households focusing on switching their secondary television sets to digital as well.
More than half (19.1 million) of the 35 million secondary sets have now been converted to digital, said regulator Ofcom.