Jake Julian Barrington Meyer BEM VR FRGS (born 20 January 1984) is a British mountaineer and adventurer. He achieved fame by becoming the youngest Briton to climb Mount Everest in 2005, aged 21 years 4 months. In doing so, Meyer also became the youngest man in the world to complete the Seven Summits. More recently in 2018 he summited K2, the second highest mountain in the world, and climbed Everest a second time. He has taken part in over 30 expeditions around the world.
 From Tetbury in Gloucestershire, England, Meyer was educated at Beaudesert Park School, Hawtreys, Cheam School and Marlborough College, then embarked on the study of Environmental Geoscience at Bristol University, where he was also a member of Bristol University Officer Training Corps. He has since been commissioned into the Royal Wessex Yeomanry as an Armoured Troop Leader and has served in Afghanistan.
 Meyer began climbing at 13. Aged 15, he saw in the new millennium with his father from the crater rim of his first summit, Kilimanjaro. At 18, he climbed Mount Elbrus in Southern Russia, Europe's highest peak. In 2002, he was awarded with a Winston Churchill Memorial Trust travelling fellowship to climb Elbrus (aged 18), Aconcagua (aged 18), Denali (aged 19) and Mount Kosciuszko (aged 19), the highest peaks in North and South America and Australia. He then climbed Mount Vinson, the highest peak in Antarctica, before attempting Everest.
 Meyer ascended from the Tibetan side, via the North Col-North East Ridge route.  The climb started on 2 April 2005, reaching the summit on 4 June 2005.
 He was accompanied by Diahanne Gilbert, the Scottish team leader, and two Sherpas, Mingma Nuru and Anil Bhattarai.
 Meyer's climb was in aid of the Children's Wish Foundation.
 On the 23rd May 2023, Meyer summited Everest for a second time via the South Col Route from Nepal with Fursang Sherpa. This followed an attempt to climb Kanchenjunga, where he was part of a team that reached c8350m before turning back after the rope fixing team ran out of rope. 
 Meyer is a self-confessed peak-bagger/Highpointer and enjoys collecting country highpoints around the world. Many of these are not considered technical challenges, or may not even count as a true mountain, however they often represent a logistical challenge, or a mini adventure to a country, region or area which he wouldn't otherwise travel to, and visit with family/friends.  To date this includes:
 Meyer has broken and holds or has previously held several records:
 Jake married Saskia Stoop in 2013. They have three daughters: Ottalie (born 2014), Poppy (born 2016) and Sienna (born 2020). They currently live in Fernhurst, West Sussex. He is a full-time leadership development consultant for The Inspirational Development Group, a UK based global development consultancy. He was the first ambassador for the British watch maker Bremont, and is their longest serving ambassador.  
 Meyer has often used his expeditions to raise money for charities which are close to his heart, especially military and youth charities. He is an ambassador for Walking With The Wounded, and has also fundraised for Help for Heroes and the ABF (Soldier's Charity). He is a keen supporter of the Duke of Edinburgh's Award Scheme, and has also supported the Prince's Trust, Make a Wish Foundation, Prince's Teaching Institute, the CAIRN Trust (Child Action in Rural Nepal), and Mercy Ships . He is a regular speaker at schools around the UK and has a Explorer Scout Group named after him (The Meyer Explorer Scouts in Dursley, Gloucestershire). 
 Meyer was awarded the British Empire Medal (BEM) in the 2020 Birthday Honours for services to mountaineering, young people and charity.