$39.7 Million Excalibur Casino, Las Vegas\n\n The largest jackpot on a slot machine at any casino took place at the Excalibur Casino in Las Vegas. Way back in 2003, the winner was a young software engineer who chose to remain anonymous. This gambler from Los Angeles dropped a mere $100 into the slot machine.
Biggest Online Jackpots Ever Hit\n\n The top spot on the list is held by Mega Moolah, a popular online slot game that has produced some of the largest jackpots in online casino history. In 2024, a lucky player won a whopping $16.7 million, setting a new world record for the largest online slot jackpot ever won.