Semi-professional sports are sports in which athletes are not participating on a full-time basis, but still receive some payment. Semi-professionals are not amateur because they receive regular payment from their team, but generally at a considerably lower rate than a full-time professional athlete. As a result, semi-professional players frequently have (or seek) full-time employment elsewhere. A semi-pro player or team could also be one that represents a place of employment that only the employees are allowed to play on. In this case, it is considered semi-pro because their employer pays them, but for their regular job, not for playing on the company's team.

The semi-professional status is not universal throughout the world and depends on each country's labour code (labour law) and each sports organization's specific regulations.