Last name Mietla (Mietla 
) , in all the world, is a rare surname. The family name Mietla is characteristic of Poland, where it is a rare surname, Czechia, and Switzerland, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Poland, the United States, and Czechia. More frequently, Mietla is the forename as well as the last name.