Cognomen Haaga (Haaga 
) , across the world, is quite a rare last name. The cognomen Haaga is habitual in Sweden, where it is quite a rare surname, Finland, and Germany, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Germany, Nigeria, and the United States. Likewise, Haaga is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Haaga | Germany, Nigeria, United States, Sweden, Finland |
| friedrich haaga DE (b. 1822) |
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| eduard haaga DE (b. 1846) |
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| erwin haaga German association football player, DE (b. 1914) |
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| werner haaga German association football player, DE (b. 1947) |
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| john haaga (b. 1945) |
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| dirk haaga German computer scientist, DE (b. 1962) |
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| trent haaga Film actor, screenwriter, US (b. 1971) |
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| kristian agasøster haaga researcher |
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| jason haaga researcher |
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| hilkka haaga FI |
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| paul g. haaga, jr. US |
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| kathrin haaga |
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| joseph haaga |
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