Mārcis Šteinbergs (born 28 August 2001) is a Latvian professional basketball player for Baxi Manresa of the Liga ACB.

Mārcis started his career at his hometown team BK Ogre.

In January 2019, he signed a long-term deal with CB Gran Canaria.

[1] After playing mainly for the second team in Liga EBA and LEB Plata, Šteinbergs signed a contract with Baxi Manresa.

[citation needed] Mārcis' sister in a long time Latvia women's national basketball team leader Anete Šteinberga.