ECC
- 3,4-Epoxycyclohexylmethyl-3’,4’-epoxycyclohexane carboxylate
- Crossair Europe
- EC (disambiguation)
- ECC (eikaiwa)
- ECC Antwerp
- ECC memory
- EK (disambiguation)
- EQ (disambiguation)
- Early childhood caries
- East Central Conference (IHSAA)
- East Coast Conference
- East Coast Conference (Division I)
- Eastern Christian College
- Eastern Conference Champions
- Eccles railway station
- Ecclesiastes
- Eck (disambiguation)
- Economic Coordination Committee (Pakistan)
- Ecumenical Catholic Church
- Ecumenical Catholic Communion
- Ecumenical Christian Centre
- Ekk (disambiguation)
- El Camino College
- Electric Car Corporation
- Electronic Check Council
- Electronic Communications Committee
- Electronic Communications Convention
- Elgin Community College
- Elliptic-curve cryptography
- Emergency control centre
- Empire Junior College Conference
- End Conscription Campaign
- Endocervical curettage
- Engineered cementitious composite
- English China Clays
- Erie Community College
- Error correction code
- Essex County College
- Eugene Concert Choir
- European Challenge Cup
- European Champions Cup (disambiguation)
- European Commodity Clearing
- European Cricket Council
- European Cryptologic Center
- European civil code
- Evangelical Covenant Church
- Eveland Christian College
- Ewing Christian College
- Exchange coupled composite media
- Exeter
- Exeter City Council
- Reading electric multiple units
- SAP ECC
- The Evolution Control Committee
- Volvo ECC