The Cambridge University Conservative Association (CUCA) is a student political society founded in 1921 as a Conservative Association for students at the University of Cambridge. However, it has earlier roots dating back to the late nineteenth century. CUCA is not affiliated with the nationwide youth branch of the Conservative Party, the Young Conservatives, but is a fully independent Association distinct from other Conservative youth organisations. The association puts on a range of events for its members each term, notably its ‘Port & Policy’ debates, as well as addresses from several high-profile speakers.

The earliest incarnation of the Cambridge University Conservative Association was established in 1882, but lasted only a few months before dissolving. By 1884, Cambridge Conservatives launched a new group – the Cambridge University Carlton Club. This served primarily as a dining society, and existed for the next twenty years. However, shortly after the Conservative government's landslide defeat in the 1906 general election, the Cambridge University Carlton Club dissolved, just as its predecessor had. There was no Conservative student organisation in Cambridge for the remainder of the Edwardian period, and the First World War saw party political activity suspended.

The present-day Cambridge University Conservative Association was founded in 1921, with its inaugural annual dinner held on 24 January of that year. In 1928, the annual St. John's College magazine The Eagle defined "a Cambridge Conservative [association member as] the proud possessor of a certain tie, obtained by signifying with a subscription his refusal or his inability to think out any social question."

CUCA alumni had considerable influence on British politics in the 1980s and 1990s, with the rise to prominence of the 'Cambridge Mafia' including cabinet ministers Leon Brittan, Kenneth Clarke, Norman Fowler, John Gummer, Michael Howard, and Norman Lamont, who had dominated CUCA and the Cambridge Union in the early 1960s. Considerable overlap between the officeholders of the two societies continues to the present day, while various present-day Cabinet officials and Members of Parliament are CUCA alumni.

CUCA is principally a political events association, holding regular speaker meetings, social events and debates.

In recent years, CUCA has attempted to play a larger part in Cambridge University-wide politics. Members of CUCA have stood for election as Presidents of the Cambridge University Students' Union (CUSU) in recent years, whilst CUCA itself has lobbied CUSU Council directly. The association remains disaffiliated from the national Conservative Party, and has instead pitched itself as a bastion of philosophical conservatism for members of Cambridge University.

CUCA's current cost of membership is £25 for life membership. Annual memberships were previously sold for £20 but their sale was ended by constitutional amendment in Easter 2023.

The association's premier debating event is 'Port and Policy', which is held around four times a term. In its current format, three motions are presented. Typically the final motion is tongue-in-cheek or less serious: the divine right of kings is a recurring topic, as is the health of Western Civilisation. After speeches for and against the motion, the floor is invited to participate via floor speeches. Once the debate has concluded, voting occurs by acclamation in proposition and opposition. For many years Port and Policy had been a roundtable discussion, with the adversarial format only introduced in 2016, but this change has already driven attendance to, on occasion, over 100.