Detroit Country Day School (also known as DCD, DCDS, or Country Day) is a private, secular school with three campuses in Oakland County, Michigan, United States.

The administrative offices, facility services, safety and security services, and the upper school (grades 9–12) are situated in a campus in Beverly Hills. The middle school (grades 4–8) is also located in Beverly Hills, seamlessly connected to the upper school. Additionally, the Lower School (PK–3) is situated in Bloomfield Township, near Bloomfield Hills.

DCDS was founded in Detroit in 1914 by Alden Shaw inspired by the Country Day School movement. The school's motto is Mens Sana in Corpore Sano, a Latin phrase meaning "Sound Mind in a Sound Body". The school colors are blue and gold.