Franciska Johanna "Ciska" Jansen (born 23 September 1944) is a retired Dutch track and field athlete. She competed at the 1976 Summer Olympics in the long jump and finished in 18th place.^[1]

After she reached age 40, her 6.21m jump exploded the world record for her age group, besting the previous record by Australian Olympian Helen Searle by 52 cm.^[2] For point of comparison, Bob Beamon's record improvement was 55 cm. Her record would stand for almost 15 years.