| Acronym | Definition |
|---|
| ECNA | Eiffage Construction Nord Aquitaine (French construction company) |
| ECNA | Église Chrétienne de la Nouvelle Alliance (French: Christian Church of the New Covenant; Canada) |
| ECNA | East Central North America |
| ECNA | Evangelical Church of North America (Brooklyn Park, MN) |
| ECNA | East Central Neighborhood Association (Muncie, IN) |
| ECNA | Extra Curricular Network Australia (est. 2007) |
| ECNA | European Computer Network for the Arts |
| ECNA | E-Community Networking Association (Australia) |
| ECNA | Eastern Cape News Agency (South Africa) |