Eco

Eco may refer to Ecology or Economics. It may also refer to:

Arts and entertainment

 * Eco (video game), a 1988 life simulation game
 * Eco (2018 video game), a 2018 simulation game
 * Emil Chronicle Online, a 2005 Japanese MMO computer game
 * English Chamber Orchestra, based in London
 * Eco, a character in the Dragonar Academy light novel series
 * Eco, a fictional substance in the Jak and Daxter games
 * Eco, a character on the children's show The Shak

Government and politics

 * Economic Cooperation Organization, an international organization
 * Environment and Conservation Organisations of Aotearoa New Zealand
 * Environmental Commissioner of Ontario
 * European Communications Office

Technology

 * .eco, a top-level domain for the Internet
 * eco - Association of the Internet Industry, the German Internet industry association
 * Elementary column operations, an operation performed on the columns of an elementary matrix in mathematics
 * Engineering change order

Other uses

 * Eco (currency), a proposed currency
 * ECO: A Covenant Order of Evangelical Presbyterians, a Christian denomination
 * Edison Chouest Offshore, an American shipbuilder
 * Encyclopaedia of Chess Openings
 * Energy Company Obligation, a government scheme in Great Britain
 * Environmental Children's Organization, a children's environment organization founded by Severn Suzuki in the 1990s
 * Equity carve-out
 * Esporte Clube Osasco, a Brazilian football club
 * Eternally collapsing object
 * Noticias ECO, a defunct television network
 * Umberto Eco (1932–2016), Italian philosopher, semiotician, novelist