Da'mario Donshay Horne-McCullough (born May 11, 1994), known professionally as Rio da Yung OG, is an American rapper.[1] He is known for being a key rapper in the Flint and Detroit rap scene and collaborating with Flint and Detroit rappers such as RMC Mike and Peezy. His first ever song was called “Dog” in January 25, 2016. He was sentenced to five years in prison in 2021 but continued to release music while incarcerated. He was released on December 11, 2024 and has continued to release music. He is a signee of Peezy's record label Ghetto Boyz Entertainment.

He has been rapping under the name Rio da Yung OG since 2017. In 2019, he was placed under house arrest due to drug trafficking charges. This period led him to great musical productivity, releasing seven projects in the space of a year, including the Dum and Dumber mixtape series in collaboration with rapper RMC Mike, which gained him notoriety within the rap scene. In 2020, he released City on My Back, a 15-track album. He then helped put other local artists on the map, including YN Jay and Louie Ray.

His career was interrupted in 2021 by a 44-month prison sentence. Just before his incarceration, he recorded "Last Day Out", a song with nostalgic tones. Despite his imprisonment, his popularity continued to grow and he continued to regularly release music recorded prior to his imprisonment. He released the Fiend Lives Matter EP in 2021, The F Tape EP in 2023 and the Rio Circa 2020 album in 2024. In May 2024, his single "Legendary", released in 2019, was certified gold. He was released in December 2024 and celebrated his release with the album Rio Free in January 2025. He released his second 2025 album, F.L.I.N.T. (Feeling Like I'm Not Through), in August 2025.