Juan de la Cierva y Peñafiel (Mula, Murcia, (1864-03-11)March 11, 1864 - (1938-01-11)January 11, 1938) was a Spanish politician and lawyer, who served during the reign of Alfonso XIII as Minister of Public Instruction and Fine Arts, of the Interior, of War, and of Finance and Development, and in the last government of the monarchy as Minister of Development.
Cierva was the son of lawyer and notary public Juan de la Cierva y Soto, from Murcia.
He married a daughter of the banker Eleuterio Peñafiel, who was active between 1860 and 1896.
He graduated in law from the University of Madrid, beginning his political career with the Spanish Partido Liberal-Conservador (English: "Liberal-Conservative Party") as a councillor in 1895, and became the Mayor of Murcia and provincial leader of the Conservatives.
In 1896, he was given writ to stand as a deputy congressman for the region of his birth, but failed to be elected.
During the Spanish Civil War he took refuge in the embassy of Norway.
Because there was no medicine there, and such a deprivation of provisions, he contracted tuberculosis and suffered severe conditions, dying on the 11th of January, 1938.