Emotional Health Anonymous, a self-help group

Edward Hamilton Aitken wrote under the pen-name Eha

Ethernet Hardware Address, an identifier attached to most network adapters

Education for All Handicapped Children Act, a U.S. government act

East Hampton Aire, an airline which has ICAO airline designator EHA

European Heritage Alliance, a political organization

Elkhart-Morton County Airport, a U.S airport which has IATA airport code EHA

East Haven Academy, an American school

Egg hatch assay, a laboratory tool

Eicosapentaenoic acid, an omega-3 essential fatty acid