Bitcoin was created by Satoshi Nakamoto, (almost certainly) a pseudonym, that no one has been able to conclusively connect to an actual person or group of people to this day. Nakamoto vanished from the internet in 2011, leaving few clues as to who they might be. Over the years, many people have publicly claimed to be Satoshi, all failing to support the statement with indisputable facts.
In an early bitcointalk forum, Satoshi said that they started working on Bitcoin in 2007, two years before the first block was mined. The Genesis block, or the first block in the Bitcoin blockchain, was mined on January 3, 2009. Nakamoto was the miner of the Genesis block, receiving the first 50 bitcoins ever put into circulation. This reward from the first block, however, was unspendable due to a quirk in the way the Genesis block is expressed in the code. BitMEX Research has published an analysis on the early mining days of Bitcoin and concluded that “someone” mined 700,000 coins. While many assume this was Satoshi, it officially remains unproven.