Roger Maurice Knapman (born 20 February 1944) is a British politician who served as a Conservative MP before becoming Leader of the UK Independence Party (UKIP).

In this capacity he joined the Conservative Monday Club's Foreign Affairs Committee Delegation to the Croatian Government in October 1991 to observe their war of independence against Serbia.

As leader of the only British party in the European Parliament to vote against the expansion of the EU in 2004 (and publicly opposing immigration), there was some amusement in May 2006 when it was revealed that he had employed a team of Polish builders to renovate his Grade II listed home in Devon, claiming there were no suitable local workers – a claim denied by local builders.

In 2006, he announced that he had no intention of seeking re-election as party leader; the leadership contest was won in September of that year by Nigel Farage MEP.

Knapman was the only leader of UKIP to have succeeded in completing a full four-year term until Farage did so in 2014 after returning to the role in 2010.