The Daily Mirror is a British national daily tabloid newspaper. Founded in 1903, it is owned by parent company Reach plc. From 1985 to 1987, and from 1997 to 2002, the title on its masthead was simply The Mirror. It had an average daily print circulation of 716,923 in December 2016, dropping to 587,803 the following year. Its Sunday sister paper is the Sunday Mirror. Unlike other major British tabloids such as The Sun and the Daily Mail, the Mirror has no separate Scottish edition; this function is performed by the Daily Record and the Sunday Mail, which incorporate certain stories from the Mirror that are of Scottish significance.

Tabloid journalism is a popular style of largely sensationalist journalism which takes its name from the tabloid newspaper format: a small-sized newspaper also known as half broadsheet. The size became associated with sensationalism, and tabloid journalism replaced the earlier label of yellow journalism and scandal sheets. Not all newspapers associated with tabloid journalism are tabloid size, and not all tabloid-size newspapers engage in tabloid journalism; in particular, since around the year 2000 many broadsheet newspapers converted to the more compact tabloid format.