Agate de Sousa (born 5 June 2000) is a Santomean long jumper living in Portugal since 2019.

Competing as a foreign national, she has won the 2023 Portuguese Athletics Federation Championships in both the long and triple jump, and she is the current Santomean national record holder in the long jump with her 7.06 metres best.

[1] In mid-2019, de Sousa moved to Portugal, where she began competing at the Portuguese Athletics Federation Championships as a non-scoring foreign national.

[2] de Sousa improved significantly over the next several years, with her first Santomean national record coming in 2021, jumping 6.68 m to break Naide Gomes's longstanding 2001 mark.

[2] During the 2021 indoor season, de Sousa was hampered by the fact that she could not leave Portugal for international competitions because she would not be allowed back in, as she was not a Portuguese citizen.