EOA

EOA may refer to:


 * Eoa (moth), a genus of moth
 * Early-onset Alzheimer's disease, Alzheimer's disease diagnosed before the age of 65
 * Empire of Austenasia, a micronation and self-declared sovereign state in the United Kingdom
 * Encyclopedia of Arkansas History & Culture, a web-based reference work
 * Euroa railway station, Australia
 * Eve of Alana, a German band
 * East of Adelaide, a collection of neighbourhoods in London, Ontario
 * Effective orifice area, a quality measure for artificial heart valves
 * End of address, an ASCII control code