Marieke Keijser (born 21 January 1997) is a Dutch representative rower.

She is an Olympian and won the silver medal in the lightweight single sculls at the 2017 World Rowing Championships and the gold medal at the 2018 European Rowing Championships.

She is racing the Dutch lightweight women's double scull with Ilse Paulis at Tokyo 2021.

[1] When she was young she was a ballerina and was accepted for a year at the Royal Dutch Conservatorium.

By age 19, Keijser had competed at three World Rowing Junior Championships.