DEG or deg is an acronym or initialism that can mean:
- Diethylene glycol, an organic compound
- Degree (disambiguation)
- Degree (angle), a measurement of plane angle
- Degree (temperature), used in several scales of temperature
- Degree symbol, a typographical symbol °
- Degree of curvature, a measure of curvature used in civil engineering
- Degree of a polynomial, a mathematical concept that is often abbreviated "deg"
- Degree of a vertex of a graph in graph theory, the number of edges incident to the vertex, with loops counted twice; denoted as; degree of vertex is denoted
- DEG Metro Stars, an ice hockey team from Düsseldorf, Germany
- Delhaize Group (NYSE stock symbol), a Belgium based food retailer
- De Laurentiis Entertainment Group, production company/distribution unit founded by producer Dino De Laurentiis
- Dég, a village in Hungary
- Deg Hit'an, an indigenous group of Northern Athabascan people in Alaska
-
- Deg Hit'an language, a language spoken by the Deg Hit'an people
- Deutsche Investitions- und Entwicklungsgesellshaft or German Investment Corporation, the investment arm of the Federal Republic of Germany