Tetétlen is a village in Hajdú-Bihar county, in the Northern Great Plain region of eastern Hungary.

It covers an area of 32.11 km² (12 sq mi) and has a population of 1455 people (2001).

47°18′58″N 21°18′19″E / 47.31606°N 21.30517°E / 47.31606; 21.30517