KSU is a polish punk rock band from Ustrzyki Dolne. The band was founded in 1977 by Bogdan "Bohun" Augustyn (saxophone, vocals), Eugeniusz "Siczka" Olejarczyk (guitar), Leszek "Plaster" Tomkow (bass guitar), Waldemar "Burek" Kuzianik (drums) and Wojciech "Ptyś" Bodurkiewicz(keyboard). In 1978 they name themself as "KSU" which comes from begining of car plates in Ustrzyki Dolne.

First longplay "Pod prąd" was released in 1988, till that time squad of the band has changed few times. KSU released 10 official albums and there is known over 30 unofficial releases and bootlegs. During whole time of existance of the group squad has changed many times. Current members are:
Eugeniusz "Siczka" Olejarczyk (vocals, guitar), Jarosław "Jasiu" Kidawa (guitar), Paweł "Kojak" Gawlik (bass guitar), Leszek "Dziaro" Dziarek (drums).

Most known KSU songs are "1940", "Liban", "Ustrzyki", "Jabol Punk", "Moje Bieszczady", "Nocne kroki", "Wielki koniec".