Sebastian Nebyla (born 25 January 2002) is a Slovak professional footballer who plays as a midfielder for Czech First League club Jablonec.
A former youth academy player of Spartak Trnava, Nebyla joined West Ham United in 2018. He spent two seasons at the club, playing for under-18 and under-23 teams in Professional Development League.
On 4 August 2020, Slovak club Dunajská Streda announced the signing of Nebyla on a two-year deal. On 27 September 2020, he made senior team debut for Dunajská Streda's farm team à  amorÃÂn in a 2âÂÂ1 league win against Petrà ¾alka.
On 9 June 2023, Croatian club Istra 1961 announced the arrival of Nebyla on a three-year contract. On 28 January 2024, he joined Czech club Jablonec on a loan deal until the end of the season.
Born in Germany, Nebyla represents Slovakia at youth international level.