Es, ES, or similar may refer to:
Estonia (; Estonian: Eesti [ˈeːsti]), officially the Republic of Estonia (Estonian: Eesti Vabariik), is a country in the Baltic region of Northern Europe.
Escherichia coli (; also known as E. coli) is a gram-negative, facultatively anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms (endotherms).
Esperanto ( or ; in Esperanto: [espeˈranto] listen ) is a constructed international auxiliary language.
Espionage (colloquially, spying) is the obtaining of information considered secret or confidential without the permission of the holder of the information.
Esophageal cancer is cancer arising from the esophagus—the food pipe that runs between the throat and the stomach.
In chemistry, an ester is a chemical compound derived from an acid (organic or inorganic) in which at least one –OH (hydroxyl) group is replaced by an –O–alkyl (alkoxy) group.