Torrelavega (Asturian: Torlavega) is a municipality and important industrial and commercial hub in the single province Autonomous Community of Cantabria, northern Spain.

Torrelavega is a regional centre for industry and transport, and its weekly livestock fair is famous in Spain.

The Cave of Altamira, famed for the prehistoric paintings found inside, is about 10 kilometres northwest of the city.

Continuous population growth and industrial development enabled Torrelavega to attain city status in 1895 from the Queen Regent Maria Christina of Bourbon, Princess of the Two Sicilies.

The city is home to the main seat of the Spanish anarcho-syndicalist labour union the Confederación Nacional del Trabajo.