Lucas da Silva Carvalho (born 16 July 1993) is a Brazilian sprinter specialising in the 400 metres. He represented his country at the 2017 World Championships without qualifying for the semifinals. He was also an unused reserve runner for the Brazilian 4 × 400 metres relay at the 2016 Summer Olympics. He competed at the 2020 Summer Olympics. His personal best in the event is 45.37 seconds set in São Bernardo do Campo in 2017. Earlier in his career he competed in the 110 metres hurdles and the decathlon.