Microsoft has revealed the Xbox One will support up to eight wireless controllers at once. An update to the peripheral's product page reveals that the controllers will also have up to a 30 foot wireless range.
While the console will support up to eight controllers it will be down to developers to choose how many controllers they want to be able to play their games at the same time, its worth noting that the PlayStation 3 has supported up to seven controllers since its launch though only sports titles like FIFA have made use of this.