Jonathan Charles Bartley (born 16 October 1971) is a British politician who was a co-leader of the Green Party of England and Wales, a position he shared with Caroline Lucas from 2016 to 2018, and then, from 2018 to 2021, with Siân Berry.

Bartley was leader of the opposition and a councillor on Lambeth Council representing the St Leonard's ward in Streatham between 2018 and 2022.

Bartley is the founder and was (until 2016)[3] co-director of Ekklesia,[4] an independent think tank looking at the role of religion in public life and appears regularly on UK radio and television programmes.

At the age of seventeen and while still at school, Bartley hit and killed a young student while driving a car, but the death was treated as accidental and the police did not press charges.

[11] After graduating from the LSE, Bartley worked at the UK Parliament on a cross-party basis as a researcher and parliamentary assistant for a number of years.

"[12][13] In 2002, Bartley co-founded Ekklesia, a Christian think-tank which looks at "the changing role of beliefs, values and faith/non-faith in public life".

[14] In 2008, he co-founded the Accord Coalition,[15] which works to end religious discrimination and segregation in the English and Welsh school systems.

[16][17] Bartley agreed and party officials then brought the Conservative leader over to meet them, on his way to a car after a General Election campaign event in South London.

[20] Bartley said he was a "floating voter", that he felt let down by the main parties and criticised the Labour government over the issues of inclusion.

[24] In 2012, Bartley was selected as the Green Party candidate for the Lambeth and Southwark constituency for the London Assembly elections, winning over 18,000 votes.

Bartley has represented the Green Party in the media, including the BBC's welfare debate at the 2015 general election, clashing with then-Work and Pensions Secretary Iain Duncan Smith.

[28] He was instead named in fourth place on the party's list of candidates for the concurrent London Assembly elections and played an active role in the campaign.

[34][35] Bartley again stood for Parliament in the 2019 General Election in the constituency of Dulwich and West Norwood, finishing second with 16.5% of the vote.