DEK

Dek or DEK may refer to:
 * Dek language
 * Dek Island, Ethiopia
 * Dek (news), subhead
 * Dek, a proposed name for digit 10 (↊) in duodecimal
 * DEK (gene), a human gene
 * Dek, Qazvin, a village in Iran
 * German Evangelical Church Confederation (German: Deutscher Evangelischer Kirchenbund; 1922–1933)
 * German Evangelical Church in Bohemia, Moravia and Silesia
 * Deutsche Einheitskurzschrift, a German stenography system
 * Democratic National Party (Cyprus), a Greek Cypriot political party
 * Diethyl ketone, a flammable chemical
 * Donald Ervin Knuth, an American computer scientist, mathematician, and professor
 * Dek (number), the 10th number in the Dozenal number system.