Cognomen Østreng (Østreng 
) , globally, is a very rare surname. The family name Østreng is characteristic of Northern Europe, particularly Norway, where it is a rare surname.
| johan østreng NO (b. 1907) |
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| willy østreng Norwegian political scientist (b. 1941) |
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| sigrun østreng Norwegian gymnast, NO (b. 1944) |
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| cecilie cottis østreng Norwegian writer (b. 1967) |
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| helen østreng Norwegian gymnast, NO (b. 1970) |
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| marny østreng Norwegian artistic gymnast (b. 1979) |
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| aleksander østreng Norwegian snowboarder (b. 1991) |
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