Jack Dorsey is 49 years old in 2026. Jack Dorsey co-founded Twitter in 2006 and Square (now Block) in 2009 — making him one of the rare founders who built two separate multi-billion-dollar technology companies. After years of tension with Twitter's board, Dorsey sold the company to Elon Musk in 2022 and departed. At 49, he leads Block, his fintech and crypto company, and has become one of the most prominent Bitcoin advocates in technology, dedicating significant Block resources to Bitcoin development and openly arguing that Bitcoin is the future of global money.
Jack Dorsey at a Glance: Quick Facts
| Detail | Info |
| Full Name | Jack Dorsey |
| Date of Birth | November 19, 1976 |
| Age in 2026 | 49 |
| Birthplace | St. Louis, Missouri, USA |
| Known For | Twitter Co-founder · Block (Square) CEO · Bitcoin Advocate |
| Net Worth | ~$5.2B |
| Zodiac Sign | Scorpio |
| Generation | Generation X |
Jack Dorsey's Age at Every Major Milestone
| Age | Year | Milestone |
| 21 | 1997 | Built early dispatch software for taxi companies that contained the seed idea for Twitter |
| 29 | 2006 | Co-founded Twitter with Biz Stone, Evan Williams, and Noah Glass |
| 32 | 2009 | Founded Square (now Block) to enable small businesses to accept card payments via iPhones |
| 38 | 2015 | Re-named Twitter CEO after original CEO Dick Costolo resigned |
| 45 | 2021 | Stepped down as Twitter CEO, handing over to Parag Agrawal |
| 48 | 2024 | Block's Bitcoin development division (Spiral) released major contributions to Lightning Network |
Frequently Asked Questions
Q: How old is Jack Dorsey in 2026?
A: Jack Dorsey is 49 years old in 2026. He was born on November 19, 1976, in St. Louis, Missouri.
Q: Did Jack Dorsey sell Twitter?
A: Jack Dorsey was not directly involved in the sale of Twitter to Elon Musk in 2022, but he supported the acquisition publicly after Twitter's board agreed to the deal. Dorsey had already stepped down as CEO in 2021.
Q: What is Block (formerly Square)?
A: Block is a fintech company founded by Jack Dorsey in 2009. It operates Square (point-of-sale tools for businesses), Cash App (peer-to-peer payments), and Spiral (Bitcoin development). The company rebranded from Square to Block in December 2021.
Q: Is Jack Dorsey still involved with Twitter/X?
A: No. Jack Dorsey is not involved in the operations of X (formerly Twitter) since Elon Musk's acquisition. He focuses entirely on Block and Bitcoin advocacy.