Harm Ottenbros (27 June 1943 – 4 May 2022) was a Dutch road bicycle racer who raced as a professional from 1967 to 1976. His sporting career began with DTS Zaandam. Ottenbros is best remembered for capturing the gold medal and rainbow jersey at the 1969 world cycling championship road race in Zolder, Belgium. The relatively unknown Ottenbros edged Julien Stevens of Belgium by a few centimetres to take the victory.