SEF

SEF may refer to:


 * Sankara Eye Foundation, a non-profit that works for eradicating curable blindness in India
 * Serviço de Estrangeiros e Fronteiras, Portuguese Border and Alien Service
 * Sinfonia Educational Foundation, the philanthropic arm of the Phi Mu Alpha Sinfonia Music Fraternity
 * Small Enterprise Foundation, a microfinance institution operating primarily in the Limpopo province of South Africa
 * South Eastern Freeway, a Freeway in Australia
 * Special Emergency Force, A Saudi Arabian riot control and counter-terrorism force
 * Spectral edge frequency, a measure used in signal processing
 * Stadio Erinis & Filias, the Greek name for Peace and Friendship Stadium, an indoor sports arena in Athens
 * Straits Exchange Foundation, a semi-official organization of Taiwan that deals with the business matters with China
 * Supplementary eye fields, areas in the primate brain that are involved in planning and control of saccadic eye movements
 * Swap Execution Facility, a platform for regulated trading and clearing of swaps to be required in the United States by the Dodd-Frank bill
 * Swedish Elite Football
 * Swedish Electricians' Union, a trade union in Sweden
 * Seaford railway station (England), a railway station in Sussex, England

See also:


 * Sef, Iran (disambiguation)
 * Sef Gonzales, Asian-Australian murderer