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Jack Dorsey is an American businessman and computer programmer who co-founded Twitter, one of the most popular social networking services in the world. He is also the founder of Square, a mobile payments company. From a young age, Dorsey was fascinated with computers and developed a program for dispatching taxis and firefighting services at the age of 15. He studied at Missouri University of Science and Technology before dropping out to pursue his passion for technology. Alongside his friends, he launched Twitter in 2006.

Quick Facts

  • Also Known As: Jack Patrick Dorsey
  • Age: 47 Years, 47 Year Old Males
  • Family: father: Tim Dorsey, mother: Marcia Dorsey
  • Born Country: United States
  • Quotes By Jack Dorsey
  • Billionaires
  • Height: 5’11” (180 cm), 5’11” Males
  • Ancestry: British American, Irish American, Italian American
  • Notable Alumni: Missouri University Of Science And Technology
  • U.S. State: Missouri
  • City: St. Louis, Missouri
  • Founder/Co-Founder: Twitter Inc., Square, Inc.
  • More Facts
  • Education: New York University, Missouri University Of Science And Technology

Childhood & Early Life

Jack Dorsey was born on November 19, 1976, in St. Louis, Missouri, United States, to Marcia Smith and Tim Dorsey. His father was an engineer of medical equipment and worked for a company that developed mass spectrometers. Since the nature of his father’s job required the family to move frequently from one place to another, young Jack developed a passion for maps.

He went to ‘Bishop du Bourg High School’ in St. Louis, Missouri. He was known to be a quiet student as he suffered from stuttering. Jack was determined to overcome his problem and hence participated in a variety of oratory competitions and was finally able to speak without stuttering.

He developed an early interest in computers and was a member of his school’s computer club. He also spent considerable time studying the available model of IBM computers.

His fascination with maps developed into a serious hobby during his teenage years. He became interested in the challenges of coordinating taxicabs, delivery vans, ambulances, etc. and created software programs for taxi dispatching and firefighting services when he was just 15.

After high school, he enrolled at the ‘Missouri University of Science and Technology.’ Eventually, he transferred to ‘New York University.’ It was here that he came up with the idea of sharing short messages with friends. He did not stay long enough in the university to complete his degree.


Jack Dorsey started working as a programmer. He moved to Oakland, California in 2000 in search of better career prospects. He started a company to dispatch taxis, couriers, and emergency services using his dispatch software.

During this time, he also got serious about his idea of a short message communication service that would update his friends about his status in real-time.

Meanwhile, his company failed and he struggled for the next few years. He made a living by freelancing. He even attended massage therapy courses. However, he never gave up on his dream of creating the short message service, which he had envisioned.

He approached ‘Odeo,’ a directory and search destination website, which was interested in text messaging services. He managed to catch the attention of ‘Odeo’ co-founder Evan Williams and one of the company’s executives Biz Stone.

In October 2006, Dorsey, along with Biz Stone, Evan Williams, and some other members of ‘Odeo,’ formed ‘Obvious Corporation,’ which later evolved into Twitter. Within two weeks, Dorsey created a simple site where users could instantly post short messages called ‘tweets’ of 140 characters or less.

Initially, Dorsey served as Twitter’s CEO. In 2008, Williams took over the role of CEO, while Dorsey became the chairman of the board. The company grew rapidly. Within five years of its founding, Twitter users were sending 50 million tweets per day.

In 2009, Dorsey teamed up with fellow entrepreneur and computer science engineer Jim McKelvey to form ‘Square Inc.’ Primarily started as a mobile payments company, ‘Square’ eventually branched into financial and merchant services as well. It is a fast growing company and Dorsey serves as its CEO.

On December 24, 2013, it was announced that Dorsey is the new member of the board of directors of ‘The Walt Disney Company.’

Major Works

Jack Dorsey is best known as the co-founder of online social networking service Twitter. Launched in 2006, the service became extremely popular within months. As of May 2015, Twitter has more than 321 million users and over 25 offices around the world.

Awards & Achievements

In 2008, he was included in the ‘MIT Technology Review TR35’ as one of the top 35 innovators in the world under the age of 35.

He was presented the ‘Innovator of the Year Award’ for technology by ‘The Wall Street Journal’ in 2012.

Personal Life & Legacy

Jack Dorsey has dated many women, including British model Lily Cole and yoga instructor Kate Greer.

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