Last name Ojsteršek (Ojsteršek 
) , worldwide, is a rare surname. The last name Ojsteršek is habitual in Southern Europe, particularly Slovenia, where it is quite a rare surname, and Croatia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ojsteršek | Croatia, Slovenia |
| dagmar ojsteršek DE (b. 1954) |
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| uroš ojsteršek SI |
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| mihael ojsteršek SI |
|
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| robert ojsteršek SI |
|
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| tina cvahte ojsteršek SI |
|
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| vojka ojsteršek SI |
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| milan ojsteršek SI |
|