YEC may refer to:
- Year End Championships, the season ending tennis tournaments
- ATP World Tour Finals (men's tennis)
- WTA Championships (women's tennis – top eight)
- WTA Tournament of Champions (women's tennis – subtop)
- Ying e Chi, a non-profit organization of independent filmmakers in Hong Kong
- Yorkshire Engine Company, a former locomotive manufacturer in Sheffield, England
- Young Earth creationism, a religious belief of a young creation of life and earth
- Yukon Energy Corporation, a Canadian Crown corporation in the Yukon
yec may refer to :
- Yeniche language (ISO 629-3 code), a variety of German spoken in Europe