Family name Flatten (Flatten 
, กลัดผ่อง) , worldwide, is a rare surname. The last name Flatten is habitual in Germany, where it is a rare surname, Norway, and the United States.
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| Flatten | Norway, Germany, Canada, United States, China |
| heinrich flatten German canon law jurist, DE (b. 1907) |
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| karina flatten-ernst (b. 1942) |
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| jeff flatten researcher (ORCID 0000-0003-2339-2935) |
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| daniela flatten researcher |
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| skyler flatten American basketball player, US (b. 1995) |
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| aron flatten |
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