Alexei Bychenko (Hebrew: אלכסיי ביצ'נקו; Ukrainian: Олексій Юрійович Биченко; born 5 February 1988) is a retired Ukrainian-born Israeli figure skater. He represented Ukraine through 2009 and Israel after that. He is the 2016 European Figure Skating Championships silver medalist and 2016 Rostelecom Cup bronze medalist. He is the first Israeli skater to medal at the European Championships. He placed fourth at 2018 Worlds. Bychenko competed for Israel at the 2014, 2018, and 2022 Winter Olympics.

Bychenko was born in Kyiv, Ukraine, and is Jewish. He studied at National Pedagogical Dragomanov University, in Kyiv. His mother is of Jewish descent, and he became an Israeli citizen and in 2010 began representing Israel in competitions.

Bychenko began skating in 1993.

Representing Ukraine, Bychenko debuted on the ISU Junior Grand Prix (JGP) series in the 2003–04 season. His senior international debut took place in late September 2005 at Skate Israel, but he continued occasionally appearing on the junior level. He achieved his best JGP result, 8th, in October 2006 in Taipei, at his final junior event.

Bychenko became a two-time (2007, 2008) Ukrainian national silver medalist on the senior level. His final international appearance for Ukraine came in late November 2009 at the Crystal Skate of Romania.

His coaches are Roman Serov, Nikolai Morozov, and Galit Chait Moracci, and his choreographer is Galit Chait Moracci. He trains in Hackensack, New Jersey.

Bychenko first appeared internationally for Israel at the Golden Spin of Zagreb in December 2011. He qualified for the final segment at the 2012 European Championships in Sheffield and went on to finish 22nd overall. At the 2012 World Championships in Nice, he did not advance past the short program.

At the 2013 Nebelhorn Trophy, Bychenko qualified a spot for Israel in the men's event at the 2014 Winter Olympics.