Surname Hằng (Hằng 
) , around the world, is a common cognomen. The last name Hằng is characteristic of Vietnam, where it is quite a common surname, Macao, where it is quite a rare surname, and Australia, where it is a very rare surname. Much less frequently, Hằng is the forename as well as the last name.
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| Hằng | Saudi Arabia, Macao, Japan, Vietnam, Australia |
| hằng phương poet, VN (b. 1908) |
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| thái hằng Vietnamese singer, VN (b. 1927) |
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minh hằng Vietnamese singer and voice actress, VN (b. 1987) |
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| ngô thị thanh hằng politician, VN (b. 1960) |
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| trương thị thu hằng Vietnamese politician, VN (b. 1961) |
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| thanh hằng Vietnamese singer and actress, VN (b. 1962) |
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| phượng hằng Vietnamese singer, VN (b. 1967) |
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| bùi thu hằng VN (b. 1971) |
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| phạm thanh hằng Vietnamese actress and supermodel, VN (b. 1983) |
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| phạm thu hằng Vietnamese beauty contestant, VN (b. 1984) |
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| trương thanh hằng Vietnamese middle distance runner, VN (b. 1986) |
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| minh hằng VN |
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