Telsen Department is a department of Chubut Province in Argentina.
The provincial subdivision has a population of about 1,788 inhabitants in an area of 19,893 km<sup>2</sup>, and its capital city is Telsen, which is located around 1,494 km from the Capital federal. It has an elevation of 611 meters.
In 2010 the population was 1,644. The population of the department, as of 2022, is 1,681 inhabitants. The gender demographics are 875 males to 748 females. It currently has a population density of 0.08 per square kilometer.