Middlesex Middle School is a middle school in the Darien Public Schools district in Darien, Connecticut, United States. The school serves students from sixth through eighth grades. Each grade is divided into 4 teams of around 90 to 150 students. In eighth grade there are the Teal (formerly Tan), Maroon, Navy and Green teams, for seventh grade there are the Gold, Purple, Aqua and Blue teams and for sixth grade there are the Yellow (formerly Bronze), Silver, Red and Orange teams.