Brynjar Ingi Bjarnason (born 6 December 1999) is an Icelandic footballer who plays as a centre-back for German club Greuther Fürth and the Iceland national team.
On 30 June 2021, he signed a three-year contract with an option for fourth year with Italian club Lecce.
On 23 July 2025, Brynjar Ingi signed a two-season contract with Greuther Fürth in German 2. Bundesliga.
Brynjar Ingi Bjarnason made his international debut for Iceland on 29 May 2021 in a friendly match against Mexico in Arlington, Texas. He scored his first international goal against Poland in Poznaà  on 8 June 2021.