John Baron, English captain and politician
John Charles Baron (born 21 June 1959) is a British politician who has served as the Member of Parliament (MP) for Basildon and Billericay, previously Billericay, since 2001. A member of the Conservative Party, he has rebelled against his party relatively frequently, specifically in his calling for a referendum on the European Union (EU) before the 2015 election and in opposing military intervention in Iraq, Libya and Syria.

Baron is a strong critic of the EU; he was a vocal supporter of Brexit during the 2016 EU referendum. He is now a supporter of the pro-Brexit Leave Means Leave campaign.