Jakub Niewiadomski (born 9 April 2002) is a Polish professional footballer who plays as a left-back for II liga club Pogoń Grodzisk Mazowiecki.
[3] He made his debut for the Niewiadomski club on 2 November 2020 in the cup with a 2–3 win over Znicz Pruszkow, replacing Dani Ramírez from the reserve at the 76th minute.
[10] For the 2023–24 season, Niewiadomski was moved to a refounded reserve team, competing in the Lesser Poland group of the IV liga.
He made 30 appearances and scored seven goals as Wisła II were crowned champions and returned to the fourth division after a seven-year absence.
[12] On 10 July 2024, Niewiadomski joined II liga returnees Pogoń Grodzisk Mazowiecki on a deal until the end of the season, with an option for a further year.