EIA may refer to:
- Edmonton International Airport
- EIA Multiport, a North American NTSC SCART connector
- Erbil International Airport
- Electronic Industries Alliance (until 1997 Electronic Industries Association), a US trade organization
- Energy Information Administration, a part of the US Department of Energy
- Enterprise information architecture
- Environmental impact assessment, an assessment of the likely environmental impact of a project
- Environmental Investigation Agency, a non-governmental organization
- Enzyme immunoassay
- Equine infectious anemia, a horse disease
- Equity-indexed annuity, a financial product
- Evergreen International Airlines, an American airline with ICAO code EIA
- Exercise-induced anaphylaxis
- Exercise-induced asthma
- External iliac artery
Eia may refer to
- Harald Eia, a Norwegian comedian