Secu may refer to:
Places in Romania Secu, a commune in Dolj County Secu, a village in Reșița, Caraș-Severin County Secu, a village in Toplița, Harghita County Secu, a village in Bicaz, Neamț County Secu, a tributary of the Bârzava in Caraș-Severin County Pârâul Sec, a tributary of the Neagra Broștenilor in Harghita County Secu, a tributary of the Popeni in Bacău County Secu, a tributary of the Bistrița in Neamț County Secu (Neamț), a tributary of the Neamț in Neamț County Secu, a tributary of the Botiza in Maramureș County Secu, a tributary of the Pogăniș in Caraș-Severin County
People Serghei Secu, Moldovan football manager and former footballer
Other State Employees Credit Union Contraction of Securitate, former Romanian secret police agency the official acronym for the Canadian House of Commons Standing Committee on Public Safety and National Security