Briana Nichole Williams (born 21 March 2002) is an American-born Jamaican female sprinter who is the world age-15 record holder, the world youth (under-18) and age-17 record holder, and the Jamaican junior (under-20) record holder in the women's 100 metres.
She earned gold medals in the 100 metres, the 200 metres, and the 4 × 100 metres relay at the 2018 CARIFTA Games in the under-17 category, setting championship records in the 100 metres and 4 × 100 metres relay, earning her the games' Austin Sealy award.
Later that year she became the youngest girl ever to win both the 100 metres and the 200 metres at the 2018 IAAF World U20 Championships in Tampere.
For her athletics achievements in 2018 she was nominated for the IAAF Female Rising Star and the Laureus Breakthrough of the Year awards.At the 2019 CARIFTA Games Williams again tripled in the 100 m, 200 m, and 4 × 100 m relay to win three gold medals in the under-20 category, and was the first Jamaican to earn the games' Austin Sealy award two years in a row since Usain Bolt in 2004.Her personal best in the 100 m is 10.94 s, set on 21 June 2019 at the Jamaican Championships final in Kingston.
A few hours earlier she had set both the Jamaican youth and Jamaican junior national records with a time of 11.01 s in the semi final.
Her previous two personal bests from a few weeks earlier, 11.02 s and 11.10 s, were also simultaneously the Jamaican youth and Jamaican junior records.
Her personal best before that, 11.13 s set in March 2018, is the world age-15 record.