There have been two Spanish Republics:

• First Spanish Republic
  First Spanish Republic
  The First Spanish Republic was the political regime that existed in Spain between the parliamentary proclamation on 11 February 1873 and 29 December 1874 when General Arsenio Martínez-Campos's pronunciamento marked the beginning of the Bourbon Restoration in Spain...
  
   (1873–1874)
• Second Spanish Republic
  Second Spanish Republic
  The Second Spanish Republic was the government of Spain between April 14 1931, and its destruction by a military rebellion, led by General Francisco Franco....
  
   (1931–1939)

Spain

Spain

Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

 is not currently a republic

Republic

A republic is a form of government in which the people, or some significant portion of them, have supreme control over the government and where offices of state are elected or chosen by elected people. In modern times, a common simplified definition of a republic is a government where the head of...

, but a constitutional monarchy

Constitutional monarchy

Constitutional monarchy is a form of government in which a monarch acts as head of state within the parameters of a constitution, whether it be a written, uncodified or blended constitution...

. After the Second Republic's fall, General Franco

Francisco Franco

Francisco Franco y Bahamonde was a Spanish general, dictator and head of state of Spain from October 1936 , and de facto regent of the nominally restored Kingdom of Spain from 1947 until his death in November, 1975...

 declared Spain to be a monarchy, though he did not permit a monarch until his death in 1975.

Occasional embarrassing errors in regard to Spain's status may have been caused by the Spanish language

Spanish language

Spanish , also known as Castilian , is a Romance language in the Ibero-Romance group that evolved from several languages and dialects in central-northern Iberia around the 9th century and gradually spread with the expansion of the Kingdom of Castile into central and southern Iberia during the...

 title of the Prime Minister of Spain

Prime Minister of Spain

The President of the Government of Spain , sometimes known in English as the Prime Minister of Spain, is the head of Government of Spain. The current office is established under the Constitution of 1978...

, Presidente del Gobierno (president of the government), as the title of "president" is usually associated with republics.