DCV can mean:
- 605 (DCV in Roman numerals), a common year starting on Friday of the Julian calendar
- 605 (number), a harshad number in Roman numerals
- Basque Christian Democracy (Democracia Cristiana Vasca), a Basque Country Christian-democratic party
- DCV, a a generic ship prefix for deepwater construction vessels
- Demand controlled ventilation, a feedback control method to maintain indoor air quality
- Deutscher Caritasverband, German charity organisation and member of Caritas Europa and Caritas Internationalis
- Directional control valve, one of the most fundamental parts of hydraulic and pneumatic systems
- Drosophila C virus, a viral disease of the genus Cripavirus