Tiffani Silva Marinho (born 6 May 1999) is a Brazilian athlete. She competed in the mixed 4 × 400 metres relay event at the 2019 World Athletics Championships. She competed at the 2020 Summer Olympics. Silva Marinho won the gold medal in 4×400 m relay mixed relays and bronze in 400 m during the 2021 Junior Pan American Games held in Cali, Colombia.