Es, ES, or similar may refer to:
Estonia (Estonian: Eesti [ˈeːsti] ( listen)), officially the Republic of Estonia (Estonian: Eesti Vabariik), is a country in Northern Europe.
Escherichia coli (; also known as E. coli /ˌiː ˈkoʊlaɪ/) is a Gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms (endotherms).
An essay is, generally, a piece of writing that gives the author's own argument — but the definition is vague, overlapping with those of a paper, an article, a pamphlet, and a short story.
Esophageal cancer is cancer arising from the esophagus—the food pipe that runs between the throat and the stomach.
Espionage or spying, is the act of obtaining secret or confidential information without the permission of the holder of the information.