The initials CCSD may represent: Calgary Catholic School District, Alberta, Canada California College San Diego Camden City School District, New Jersey Central Columbia School District, Pennsylvania Chappaqua Central School District, New York Charleston County School District, South Carolina Cherry Creek School District, Colorado Clark County School District, Nevada Clarkstown Central School District, New York Coahoma County School District, Mississippi Cobb County School District, Georgia College Community School District, Iowa Crook County School District, Oregon Coupled Cluster Singles and Doubles – a method in coupled cluster theory Centre pour la communication scientifique directe, a French research organization in charge of open access repositories for academic publishing