| Konstantin Arnoldi | |
| Native Name: | Константин Владимирович Арнольди |
| Native Name Lang: | ru |
| Birth Name: | Konstantin Vladimirovich Arnoldi |
| Birth Date: | 5 January 1901 |
| Birth Place: | Moscow, Russian Empire |
| Death Place: | Moscow, Soviet Union |
| Citizenship: | Soviet |
| Nationality: | Russian |
| Fields: | Entomology |
| Workplaces: | Moscow State University |
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| Thesis1 Year: | and |
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Konstantin Vladimirovich Arnoldi (Russian: link=no|Константин Владимирович Арнольди; 5 January 190112 December 1982) was a Soviet and Russian biologist and entomologist. He was the son of Vladimir Arnoldi.