Mikulin may refer to:
- Alexander Mikulin, Soviet aircraft-engine designer
- Mikulin, Kraśnik County in Lublin Voivodeship (east Poland)
- Mikulin, Łódź Voivodeship (central Poland)
- Mikulin, Tomaszów Lubelski County in Lublin Voivodeship (east Poland)
- An interglacial period on the East European Plain 130,000–114,000 years ago — see Eemian
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