ESN may refer to:
- Eastern Security Network, the armed wing of the Indigenous People of Biafra (IPOB)
- Easton Airport (Maryland), United States
- Echo state network in computer science
- Edmonton Street News, a Canadian newspaper
- Einstein summation notation, used in mathematical physics
- Electronic serial number for mobile devices
- Emergency Services Network, in the UK
- Enterprise Social Network
- Entertainment Studios Networks, an American cable network
- Erasmus Student Network, a European student organization
- European Sensory Network, studies the five senses
- European Society for Neurochemistry
- Salvadoran Sign Language
This disambiguation page lists articles associated with the title ESN.
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