Eastern Tasmanian is an aboriginal language family of Tasmania in the reconstructed classification of Claire Bowern.

[1] Bayesian phylogenetic analysis suggests that four (at p < 0.20) to five (at p < 0.15) Eastern Tasmanian languages are recorded in the 26 unmixed Tasmanian word lists (out of 35 lists known).

These cannot be shown to be related to other Tasmanian languages based on existing evidence.

[1] The Flinders Island lingua franca was based primarily on Eastern and Northeastern Tasmanian languages.

[3] The English-based Bass Strait Pidgin continued some vocabulary from the lingua franca.