Willemina Hendrika "Ineke" Tigelaar (born 9 October 1945) is a Dutch former freestyle swimmer who competed in the 1964 Summer Olympics. She won four medals at the 1962 European Aquatics Championships, including one gold in the 4 × 100 m freestyle relay. Between 1961 and 1964 she won six national titles in the 100 m, 400 m and 1500 m freestyle events. In 1962 and 1964 she was part of the Dutch teams that set new European records in the 4 × 100 m freestyle relay.