Tammiku is a village in Väike-Maarja Parish, Lääne-Viru County, in northeastern Estonia.

[1] Prior to the 2017 administrative reform of Estonian local governments, the village was part of Rakke Parish.

The village was originally called Suure-Tammiku (literally, 'big Tammiku') in contrast to neighboring Väike-Tammiku (literally, 'little Tammiku').

The name (in the genitive case) comes from the common noun tammik 'oak forest', referring to the local vegetation.

This Lääne-Viru County location article is a stub.