An 8-second violation in basketball refers to the rule where the offensive team must advance the ball from their backcourt, the half of the court containing their defensive basket, to the frontcourt, the half containing their offensive basket, within 8 seconds. Failure to do so results in a turnover, with possession awarded to the opposing team.

Once the team inbounds the ball, they have no more than eight seconds to advance the ball past mid-court. If the team is charged with an 8-second violation, they then give possession to their opponent and are charged with a turnover.