Republicanism in Spain is a political position and movement that believes Spain should be a republic.
There has existed in Spain a persistent trend of republican thought, especially throughout the 19th, 20th, and 21st centuries, that has manifested itself in diverse political parties and movements over the entire course of the history of Spain. While these movements have shared the objective of establishing a republic, during these three centuries there have surged distinct schools of thought on the form republicans would want to give to the Spanish State: unitary or federal.
Despite the country's long-lasting schools of republican movements, the government of Spain has been organized as a republic during only two short periods in its history, which totaled 9 years and 8 months of republican government. The First Spanish Republic lasted from February 1873 to December 1874, and the Second Spanish Republic lasted from April 1931 to April 1939.
Under the monarchical regime currently in force in Spain, there are movements and political parties throughout the entire political spectrum that advocate for a Third Spanish Republic. Despite enjoying a wider support within the left wing political camp, there are also liberal, right-wing, conservative and nationalist parties espousing republican stances.