Surname Plocha (Plocha 
) , throughout the world, is a rare cognomen. The cognomen Plocha is characteristic of Poland, where it is a rare surname, Czechia, and the United Kingdom, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Poland, Czechia, and the United States. More prevalently, Plocha is the forename as well as the last name.