Dynkin (Russian: Дынкин) is a Russian masculine surname, its feminine counterpart is Dynkina. It may refer to the following notable people:
- Aleksandr Dynkin (born 1948), Russian economist
- Eugene Dynkin (1924–2014), Soviet and American mathematician known for
- Dynkin diagram
- Coxeter–Dynkin diagram
- Dynkin system
- Dynkin's formula
- Doob–Dynkin lemma
- Dynkin index