Steven Lammertink (born 4 December 1993) is a Dutch former professional racing cyclist, who competed professionally between 2012 and 2019 for the Cycling Team Jo Piels, SEG Racing, LottoNL–Jumbo and Vital Concept–B&B Hotels teams. He rode at the 2013 UCI Road World Championships, and his older brother Maurits Lammertink is also a cyclist.