Family name Ost (Host 
, Ost , Oost ) , globally, is a common cognomen. The family name Ost is habitual in Suriname, where it is quite a common surname, Belgium, and Netherlands. Not in comparison with a country's population, it most frequently occurs in Germany, the United States, and Netherlands. Much less frequently, Ost is the forename as well as the last name.
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| Oost, Ost, Host | Brazil, Belgium, Netherlands, United States, Germany |
| Ostr | Poland, United States, Russia, France, Ukraine |
| johann georg ost DE (b. 1672) |
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| joseph von ost (1773-1814), AT (b. 1773) |
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| johann ost (1806-1871) (b. 1806) |
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| johann ost (b. 1813) |
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alfred ost artist (1884-1945), BE (b. 1884) |
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| hermann ost German chemist (1852-1931), DE (b. 1852) |
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| emil ost RU (b. 1846) |
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| mořic ost holocaust victim, b. 1880-11-24, CZ (b. 1880) |
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| louis ost American football coach (1892-1960), US (b. 1892) |
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friedhelm ost German television presenter, journalist and politician, DE (b. 1942) |
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| william f. ost American politician – Minnesota -House 1933-38 (District 50), US (b. 1900) |
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| warren ost American missionary (b. 1901) |
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françois ost Belgian playwright, philosopher, and jurist, BE (b. 1952) |
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| willi ost German military personnel, DE (b. 1903) |
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daniel ost florist, BE (b. 1955) |
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