Sérgio Miguel Moreira Paulinho, <small>ComIH</small> (born 26 March 1980) is a Portuguese former prfoessional road bicycle racer. He was a domestique in the 2007, 2009 and 2010 Tour de France and won the silver medal for Portugal in the 2004 Athens Olympic Games.
Paulinho was born in Oeiras. After winning a bronze medal in the 2002 UCI Road World Championships, in under-23, in 2003, he became a professional cyclist and started gaining reference in one of the most important Portuguese teams . In 2004, he was 6th in the Volta a Portugal, winning two stages, including the final Individual time trial. In the 2004 Athens Olympic Games, he was silver medalist (Italy's Paolo Bettini got gold and Axel Merckx bronze) in the cycling road race. In 2004 he also won the Portuguese National Time Trial Championships and stages 7 and 10 of the Volta a Portugal.
Following his Olympic performance, he was signed by the team. He was implicated in the Operación Puerto doping case but was later cleared by Spanish officials of any links to the Operación Puerto doping case. He took his first Grand Tour stage win in the 2006 Vuelta a España, on stage 10. He joined the team at the end of the season.
In 2008, he again won the Portuguese National Time Trial Championships. He joined Lance Armstrong's in 2010, along with fellow countrymen Tiago Machado and directeur sportif José Azevedo. On 14 July 2010, he won the 10th stage of the Tour de France.