The Women's 49er FX was a sailing event on the Sailing at the 2016 Summer Olympics program in Rio de Janeiro and took place from 12 to 18 August at Marina da Glória.

Thirteen races (the last one a medal race) were held.

The medals were presented by Barbara Kendall, IOC member, New Zealand and Carlo Croce, President of World Sailing.

Scoring system: low-point system; Legend:   – Qualified for medal race(s); DSQ – Disqualified; UFD – "U" flag disqualification; † – Discarded race not counted in the overall result;