Lieselot Decroix (born 12 May 1987 in Poperinge) is a Belgian professional road cyclist. She represented her nation Belgium at the 2008 Summer Olympics, and has currently competed under an annual contract for CyclelivePlus-Zannata Women's Team.
Decroix qualified for the Belgian squad, as a lone female cyclist, in the women's road race at the 2008 Summer Olympics in Beijing by finishing among the top 24 and receiving a berth from the UCI World Cup. She successfully completed a grueling race with a forty-fourth-place finish through a vast field of sixty-six cyclists in 3:36:35, surpassing Mexico's Alessandra Grassi by less than a second.
44th Olympic Games, Beijing (CHN)
2009 – Cervélo TestTeam 2009 season
2nd Stage 2, Tour de l'Aude Cycliste Féminin, Port-la-Nouvelle (FRA)
3rd Belgian Championships (ITT), Hooglede (BEL)
4th Belgian Championships (Road), Saint-Ghislain (BEL)
1st Stage 4, Gracia-Orlova, Czech Republic
2nd Stage 2 (TTT), Giro del Trentino Alto Adige-Südtirol (ITA)
3rd Ronde van Gelderland (NED)