The Den was the brand of the children's television strand on Irish public broadcaster RTÉ Two. It first broadcast on 29 September 1986 on RTÉ1, before moving to Network 2 in September 1988. The strand began to diversify throughout the late 1990s and the 2000s. It was also known as Dempsey's Den, Den TV and Den2 at different times during the 1980s, 1990s and 2000s.

In mid-2010, RTÉ Television announced an overhaul of all young people's programming, especially as Ireland moves towards digital terrestrial television in autumn 2010. This overhaul took place on September 20, 2010 effectively replacing The Den branding and to incorporate two new strands, RTÉjr and TRTÉ.