Surname Жылко (Жылко 
, Zhylko 
) , in all the world, is a very rare cognomen. The cognomen Жылко is characteristic of Belarus, where it is a very rare surname, Portugal, and Canada. In absolute terms, it is commonest in Russia, Belarus, and Portugal.
| VARIANT | COUNTRY |
|---|---|
| Жылко | Russia |
| Zhylko | Belarus, Portugal, Ukraine, Canada |
| уладзімір васілевіч жылко BY (b. 1925) |
|