Cognomen Halbrook (Halbrook 
) , all over the world, is quite a rare surname. The family name Halbrook is characteristic of the United States, where it is a rare surname, New Zealand, where it is a very rare surname, and Canada. Measured by absolute frequency, the name is most common in the United States, Canada, and the United Kingdom.
| VARIANT | COUNTRY |
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| Halbrook | Philippines, United Kingdom, Canada, Brazil, United States |
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swede halbrook American basketball player, US (b. 1933) |
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| william erwin halbrook (b. 1878) |
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stephen halbrook American jurist, US (b. 1947) |
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| kristin halbrook American young adult writer, US (b. 1950) |
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| brad halbrook American politician in Illinois (born 1961), US (b. 1961) |
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| yemaya j halbrook researcher (ORCID 0000-0001-8222-6449) |
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| christopher j halbrook researcher (ORCID 0000-0002-3376-3114) |
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| rich halbrook college basketball player (1972–1974) East Tennessee State |
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