Eisa or EISA may refer to:
Computing Extended Industry Standard Architecture, a bus standard for computer add-on cards EISA partition, an OEM disk partition type Enterprise information security architecture
Organisations Electoral Institute of Southern Africa, former name of the Electoral Institute for Sustainable Democracy in Africa Expert Imaging and Sound Association (EISA Awards) European Initiative for Sustainable Development in Agriculture, an association of national and European agricultural associations and organisations
Other uses Eisa, a daughter of the jötunn Logi in Norse mythology Eisa (dance), a form of folk dance in Okinawa Energy Independence and Security Act of 2007 (EISA 2007) Hossam Eisa, Egyptian politician and academic Medina Eisa, Ethiopian long-distance runner