Surname Dyachkov (Дьячков 
, Дъячков , Dyachkov 
) , in all the world, is a common family name. The surname Dyachkov is habitual in Russia, where it is quite a rare surname, Belarus, and Kazakhstan. In absolute terms, it is commonest in Russia, Ukraine, and Kazakhstan.
| VARIANT | COUNTRY |
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| Дьячков | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| Дъячков | Kazakhstan, Russia |
| Dyachkov | Kazakhstan, Russia, United States, Poland, Canada |
| Дячков | Kazakhstan, Russia, Ukraine, Bulgaria |
Djatschkow, Диачков, Дйачков, Дьячьков, and דיאצ'קוב
| boris dyachkov Soviet athlete and athletic coach, GE (b. 1902) |
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| vladimir dyachkov Soviet athlete and athletic coach (1904-1981), GE (b. 1904) |
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| aleksandr alekseyevich dyachkov Hero of the Soviet Union, HU (b. 1923) |
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| sergey dyachkov researcher (ORCID 0000-0002-3238-3259) |
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| yuri v. dyachkov Russian entomologist, RU |
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| sergey dyachkov Azerbaijani swimmer, AZ (b. 1982) |
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| sergey dyachkov |
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Mr, Kirill, Daniil, Dmitry, Dmytro, Leonid, Nikita, Victor, Vitaly, Viktor, Mikhail, Aleksey, Ravshan, Dmitriy, Larissa, Nikolai, Nikolay, Evgeniy, Ehduard, Vasiliy, Vitaliy, Alexandr, Antony, Andrey, Andrew, Alexey, Mark, Alex, Gleb, Ilya, Ivan, Igor, Oleg, Maxim, Misha, Anton, Anatoliy, Artem, Peter, Roman, Denis, Danil, Esfir, Vadim, Yegor, Yuriy, Matvey, Sergey, Pavel, and Vladimir