Jānis Timma (born 2 July 1992) is a Latvian professional basketball player for BC Khimki of the VTB League and the EuroLeague. He also represents the senior Latvian national team. At a height of 2.03 m (6'8") tall, and a weight of 103 kg (226 lbs.), he plays mainly at the small forward position.
Timma grew up playing basketball in his hometown of Krāslava, but he later moved to Rīga, at age 15. At first he joined ASK Rīga's youth system, and made a few appearances for its senior team, during the end of the 2008–09 season. The following year, ASK Riga was dissolved and he played with DSN Rīga, a team that consisted of young Latvian talents. Timma helped DSN Rīga to win the Latvian 2nd division in the 2009–10 season. He also spent the majority of the next season playing with DSN Rīga.
Timma joined Liepājas Lauvas for the 2011–12 season. That can be considered his first real season at the pro level. After a decent season in Liepāja, Timma made the next step in his career. On 1 August 2012, he signed a multi-year contract with Ventspils.