Robert Cash (born 7 March 2001) is an American tennis player.

[3] He won the 2024 NCAA doubles title with partner James "JJ" Tracy.

[5] After winning the 2024 NCAA Doubles Championship, Cash and Tracy were given a wildcard into the 2024 US Open.

They defeated Nicolás Jarry and Cristian Rodríguez in the first round, before losing to 16th-seeded Máximo González and Andrés Molteni in three sets.

[1] He reached the top 100 in the doubles rankings on 10 February 2025, following his title at the 2025 Cleveland Open partnering Tracy.