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Look up Oinonen in Wiktionary, the free dictionary.
Oinonen is a Finnish surname. Notable people with the surname include:
- Miikka Oinonen (born 1983), Finnish footballer
- Pekka Oinonen (born 1944), Finnish diplomat
- Pentti Oinonen (born 1952), Finnish politician
- Voldemar Oinonen (1891–1963), Finnish military commander