Danas Rapšys (Lithuanian pronunciation: ?['da?n?s r?p'?i?s]; born 21 May 1995) is a Lithuanian swimmer.
He is a one-time Olympian, a multiple-time Lithuanian record holder in the men's backstroke, freestyle and butterfly, and a double swimming champion at the 2017 Summer Universiade in Taipei, Taiwan.
Rapšys is also a member of Panevežys Žemyna Club, and is coached and trained by Ina Simeliunaite.
In 2013 he became a European Junior champion.
At the 2013 FINA World Junior Swimming Championships in Dubai, United Arab Emirates, Rapšys competed in 4×100 metre mixed medley with Ruta Meilutyte, Povilas Strazdas, Eva Gliožeryte.
During 4×100 metre mixed medley heats, they finished third with a time of 3:55.74 seconds and qualified to the final.
At the 4×100 metre mixed medley final, Meilutyte, Rapšys, Strazdas and Gliožeryte finished second and won silver medal with a time of 3:52.52 seconds.
In the 2013 World Aquatics Championships he reached semifinals in the 200m backstroke swimming.