The women's 400 metre freestyle S8 event at the 2016 Paralympic Games took place on 8 September 2016, at the Olympic Aquatics Stadium. Two heats were held, the first with six swimmers and the second with seven swimmers. The swimmers with the eight fastest times advanced to the final, which was won by Australia's Lakeisha Patterson, in a world record time of 4:40.33.
Records
Prior to the competition[update], the existing World and Paralympic records were as follows.
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