Luis Araquistáin Quevedo (Bárcena de Pie de Concha, Cantabria, Spain, 1886 – Geneva, Switzerland, 1959) was a Spanish politician and writer. Member of the Spanish Socialist Workers' Party (PSOE) from a young age, he belonged to the circle of Largo Caballero and Tomás Meabe, of whom he was a close friend.
He founded the journals España, Claridad and Leviatán.
Although his leanings before and during the war were decidedly revolutionary, later he became drawn to a socialism more 'European' in character, and was moved to insist on the necessity of unity between monarchists and republicans in order that a peaceful transition from Francoism to democracy might be effected. This position made him some enemies, but he developed a great understanding with other moderate members of the PSOE.