Liberal Democrat Youth and Students (LDYS) is the youth and student group of the UK Liberal Democrats.

Liberal Democrat party members who are under 26 years old or attending higher education institutions are automatically members of LDYS. Liberal Democrat members between 26 and 29 years old can also join LDYS by paying an additional subscription. The group is financially supported by the Liberal Democrat party and has offices in the party headquarters in Cowley Street, London, but retains total operational control over its internal elections, staffing, and campaigns.