Jakub Martinec (born 13 March 1998) is a Czech professional footballer who plays as a defender for Czech First League club Jablonec.

He represented Czech Republic at youth level.

Martinec captained Czech National Football League club Hradec Králové in his final season there.

[1] On 11 August 2020, he signed a 3-year contract with Czech First League side Jablonec.

[2] Martinec said in an interview, he didn't celebrated his goal out of respect, when he scored a goal against his former club Hradec Králové on 11 September 2022.