Stéphane Laurent Lannoy (born 18 September 1969 in Boulogne-sur-Mer) is a French football referee.

Lannoy played football at an early age before moving into officiating matches.

He booked Mario Balotelli, in accordance with UEFA guidelines, for taking his shirt off after a goal celebration.

Stéphane Lannoy came into controversy for his refereeing in the match between Brazil and Ivory Coast of the 2010 FIFA World Cup when he awarded Brazilian player Kaká a second yellow card turned into red card in the 88th minute for a violent contact with Ivoirian player Abdul Kader Keïta.

However, camera evidence showed that Abdul Kader Keïta was running into Kaká and dived in the ground, covering his face as if he was injured, after the contact was made.