Secu or SECU may refer to:

• Secu – a commune in Dolj County, Romania

SECU – a common abbreviation for State Employees Credit Union

• North Carolina State Employees Credit Union

• Pennsylvania State Employees Credit Union

• South Carolina State Employees Credit Union

• State Employees Credit Union of New Mexico

• State Employees Credit Union of Maryland

• Washington State Employees Credit Union

• abbreviation for the Canadian House of Commons Standing Committee on Public Safety and National Security

• SECU – an academic arm of the Southeastern Conference

• SECU (container) – Stora Enso Cargo Unit, a type of shipping container

• The ICAO airport code for Mariscal Lamar Airport in Cuenca, Ecuador