Jon Richardson (born 1982 or 1983) is an English comedian and radio presenter. He is known for his appearances on 8 Out of 10 Cats and 8 Out of 10 Cats Does Countdown and his work as co-host with Russell Howard on BBC Radio 6 Music. He presented Jon Richardson: Ultimate Worrier, and also featured with his wife Lucy Beaumont in the TV show Meet the Richardsons.

Richardson was born in 1982 or 1983 in Lancaster, Lancashire, where he was also brought up. He attended Ryelands Primary School and Lancaster Royal Grammar School. He left the University of Bristol after taking Hispanic Studies for a year and a half, and subsequently spent some time working as a chef. He then decided to pursue a career in comedy, and lived with fellow comedians Russell Howard, Mark Olver and John Robins for a year in Bristol.

Richardson entered and won his heat of the BBC New Talent Comedy Search in May 2003. He also reached the semi-finals of the Laughing Horse New Act of the Year competition in 2004. Quickly developing throughout 2004, he was one of six acts to reach the final of the J2O Last Laugh Comedy Search. He marked the end of his first year in comedy with a performance at the Criterion Theatre in London's West End. Judges Jasper Carrott and Dave Spikey were both "extremely impressed" with Richardson's performance.

In 2006, Richardson appeared in The Comedy Zone at the Edinburgh Festival. He also completed a 60-date British and Irish tour with Alan Carr, and made an appearance on Paramount's The Comedy Store. In 2007, Spatula Pad (Richardson's first solo show at the Edinburgh Festival Fringe) earned him a Best Newcomer nomination at the Edinburgh Comedy Awards. Richardson won the 2008 Chortle Award for Best Breakthrough Act, and performed Dogmatic (his second solo show) at the Edinburgh Festival Fringe. He later took this show around the country in his first solo tour. He appeared as a team captain in Simon Mayo's 2008 series Act Your Age on BBC Radio 4.

Richardson co-hosted a Sunday-morning radio show on BBC Radio 6 Music with fellow comedian and friend Russell Howard, and after Howard left, he continued to present the show himself until 7 March 2010. In early 2009, Richardson's show This Guy at Night was nominated for the Edinburgh Comedy Awards main prize. That year, he appeared on the BBC music quiz show Never Mind the Buzzcocks. He also appeared on Have I Got News for You in December 2009 and October 2010, and was a guest on David Mitchell's The Bubble.

Richardson appeared on the BBC Radio 5 Live show Fighting Talk in February 2010. He was curator of The Museum of Curiosity for its third series. On 21 March 2010, he presented a BBC Three programme about compulsions and strange habits, entitled Different Like Me. Richardson has performed at comedy festivals in Leeds, Guildford, and Bristol, and has headlined university gigs for Off the Kerb and Avalon. He has also compèred in the French Alps, headlined in Barcelona, and performed a one-man show in Greece. In 2010 he also performed at the Melbourne Comedy Festival.

Starting with the 11th series of Channel 4's panel show 8 Out of 10 Cats, Richardson took over from Jason Manford as a team captain. Filming for the series began in June 2011. It's Not Me, It's You!, Richardson's first book, was published during the same month. Later in 2011, he became a regular comic on the Channel 4 show Stand Up for the Week, which was hosted by Kevin Bridges during its second series. Upon Bridges's departure, Richardson took over as host, a role he left after series 4 in 2012. Since January 2012, he has also been a regular on Channel 4's 8 Out of 10 Cats Does Countdown.

Richardson presented a 2012 documentary entitled A Little Bit OCD, in which he studied the lives of people diagnosed with OCD and worried that he might have the same condition; he was indeed revealed to exhibit symptoms of OCD, but did not show signs of the accompanying dysfunction. The show won the 2013 Mind Award in the documentary category.