Family name Shlenskaya (Shlenskaya 
, Шлёнская 
) , in the world, is a very rare last name. The cognomen Shlenskaya is characteristic of Belarus, where it is a rare surname, Kazakhstan, and Kyrgyzstan, where it is a very rare surname. In absolute terms, it is commonest in Russia, Belarus, and Kazakhstan.
| VARIANT | COUNTRY |
|---|---|
| Shlenskaya | Russia, United States |
| Шлёнская | Kyrgyzstan, Kazakhstan, Russia, Belarus |