Klin may refer to:
- Places
- Klin, Podlaskie Voivodeship, in northeastern Poland
- Klin, Lublin Voivodeship, in eastern Poland
- Klin Urban Settlement, a municipal formation which the Town of Klin in Klinsky District of Moscow Oblast, Russia is incorporated as
- Klin, Russia, several inhabited localities in Russia
- Klin, Námestovo District, Slovakia
- Klin (mountain), Slovakia
- People
- Ami Klin, American autism expert
- Other
- Klin (air base), an air base in Moscow Oblast, Russia
- Klin sub-machine gun, a Russian sub-machine gun
- KLIN, a radio station in Lincoln, Nebraska, United States