The inhabitants of Tarn are known, in French, as Tarnais (women: Tarnaises).

Tarn has a population, in 2014, of 384,474, for a population density of 66.8 inhabitants/km².
The arrondissement of Castres, with 194,373 inhabitants, is the arrondissement with more inhabitants.
The arrondissement of Albi has 190,101 inhabitants.

The city with more people living in it is the capital, Albi (49,531).
The subprefecture of Castres has 41,382 inhabitants.

The cities with more than 6,000 inhabitants in the department are:
The inhabitants of Tarn are known, in French, as Tarnais (women: Tarnaises).
Tarn has a population, in 2014, of 384,474, for a population density of 66.8 inhabitants/km². The arrondissement of Castres, with 194,373 inhabitants, is the arrondissement with more inhabitants. The arrondissement of Albi has 190,101 inhabitants.
The city with more people living in it is the capital, Albi (49,531). The subprefecture of Castres has 41,382 inhabitants.
The cities with more than 6,000 inhabitants in the department are:
Tarn