Daniel Oss (born 13 January 1987) is an Italian cyclist, who competes in gravel cycling for the Specialized Gravel team.

Between 2009 and 2023, Oss competed professionally in road bicycle racing, with Liquigas–Cannondale, the BMC Racing Team, Bora–Hansgrohe and Team TotalEnergies. He took two individual victories in his road racing career – the 2010 Giro del Veneto and a stage at the 2011 USA Pro Cycling Challenge – and also formed part of winning teams on team time trial stages at the 2015 Tour de France and the 2017 Vuelta a España, as well as winning gold medals in the equivalent event at the UCI Road World Championships in 2014 and 2015.