Family name Ryzhkin (Рыжкин 
, Ryzhkin 
) , across the world, is quite a rare surname. The last name Ryzhkin is habitual in Russia, where it is quite a rare surname, Estonia, where it is a rare surname, and Kazakhstan. Not in comparison with a country's population, it is commonest in Russia, Kazakhstan, and Belarus.
| VARIANT | COUNTRY |
|---|---|
| Рыжкин | Kyrgyzstan, Kazakhstan, Russia, Belarus |
| Ryzhkin | Russia, Estonia, United States, Canada, Ukraine |
| veniamin ryzhkin Soviet scientist (b. 1903) |
|