Nienke Timmer (born 10 February 1998) is a Dutch Paralympic athlete with cerebral palsy. She competes in 100 and 200 metres sprinting events for T35-classified athletes. In 2019, she won the bronze medal in the women's 100 metres T35 event at the 2019 World Para Athletics Championships held in Dubai, United Arab Emirates. She is also a three-time silver medalist at the World Para Athletics European Championships.