Big Brother 18 is the eighteenth season of various versions of television show Big Brother and may refer to:
Big Brother 18 (U.S.), the 2016 edition of the U.S. version Big Brother 18 (UK), the 2017 edition of the UK version Big Brother Brasil 18, the 2018 edition of the Brazilian version Bigg Boss (Hindi TV series) season 18, eighteenth season of Big Brother in India in Hindi released in 2024