The Eurovision Song Contest 1968 was the 13th edition of the annual Eurovision Song Contest. It took place in London, United Kingdom, following the country's first victory at the 1967 contest with the song "Puppet on a String" by Sandie Shaw. Despite having won for the first time the year before, it was actually the third time that the United Kingdom had hosted the competition, having previously done so in 1960 and 1963, both of which also took place in London. Organised by the European Broadcasting Union (EBU) and host broadcaster British Broadcasting Corporation (BBC), the contest was held at Royal Albert Hall on 6 April 1968, and was hosted by Katie Boyle for the third time. It was notably also the first time that the contest was broadcast in colour.

The Eurovision Song Contest, often known simply as Eurovision, is an international song competition organised annually by the European Broadcasting Union. Each participating country submits an original song to be performed live and transmitted to national broadcasters via the Eurovision and Euroradio networks, with competing countries then casting votes for the other countries' songs to determine a winner.