Jantje Venekamp-Tienkamp (born 9 March 1936) was a Dutch kortebaan speed skater. Tienkamp was born in Donderen. She was one of the first female speed skaters who started skating on Nordic skates. When she was 17 years old, Jaap Havekotte made customized skates for her, and would skate her whole career on them. During her 20-year career, she became 14 times champion of Drenthe. She became Dutch national kortebaan champion in Drachten on 5 January 1963, beating in the final Frisian champion Atje Keulen-Deelstra. A year later on 28 December 1964 she finished second, beaten by .