Surname Sidelka (Sidelka 
) , around the world, is a rare last name. The surname Sidelka is habitual in Slovakia, where it is a rare surname, Czechia, and the United Kingdom, where it is a very rare surname. Very seldom, Sidelka is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sidelka | United Kingdom, Czechia, United States, Brazil, Slovakia |