Rimvydas Sadauskas (born 21 July 1996) is a Lithuanian footballer who plays as a defender for Hegelmann.
Sadauskas started playing football at the age of six. He joined the National Football Academy of Lithuania at the age of seventeen.
Sadauskas started his career with Lithuanian side Stumbras. He was describe as "a real pillar of Stumbro's defense ...showing surprising consistency". In 2017, he signed for Irish side Cork City. In 2019, he signed for Lithuanian side Kauno à ½algiris. In 2022, he signed for Lithuanian side à  iauliai. In 2024, he signed for Chinese side Guangzhou FC.
On 5 February 2026, Sadauskas returned to Lithuania and joined Hegelmann.
Sadauskas was born in 1998 in Lithuania. He grew up in Kaunas, Lithuania.