Surname Ostergren (Ostergren 
) , throughout the world, is a rare cognomen. The cognomen Ostergren is habitual in Sweden, where it is quite a rare surname, Norway, where it is a rare surname, and New Zealand. Not in comparison with a country's population, the name is most common in the United States, Sweden, and Brazil.
| VARIANT | COUNTRY |
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| Ostergren | Norway, Spain, Brazil, Sweden, United States |
| frederick v. ostergren American sports coach (1892-1945), US (b. 1892) |
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| robert clifford ostergren (b. 1948) |
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| mary ostergren American biathlete, US (b. 1960) |
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| carol ostergren researcher ORCID ID = 0000-0002-3424-2708 |
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| karin c. ostergren researcher |
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| sigrid ostergren SE (b. 1985) |
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