Lek may mean:

• Lek (animal behaviour), a type of competition in which males of a certain species gather to demonstrate their prowess before or during mating season
• Lek (currency), a form of Albanian currency
• Lek River, a river in the west of the Netherlands
• Lek, a form of Cardassian currency in the Star Trek fictional universe
• Lek (meaning: "Cure" in most Slavic languages), international pharmaceutical company^*, now part of Sandoz, originally established 1946. in Slovenia.
• Lek (meaning: "Game" in Swedish).

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