Juan Bautista Quirós Segura (January 18, 1853 – November 7, 1934) was president of Costa Rica for two weeks, from August 12 to September 2, 1919,[1] following the resignation of Federico Tinoco.

He first married Teresa Aguilar Guzmán (who died in 1899), granddaughter of then head of state Manuel Aguilar Chacón, and on November 4, 1900, he married Clementina Quirós Fonseca (1880–1953), daughter of José Quirós Montero and Florinda Fonseca Guzmán.

He pursued a military career and achieved the rank of General in the Costa Rican army.

During Rafael Yglesias Castro's second administration he was designated second in line to the presidency and secretary of commerce, war, and navy as well as treasurer.

Being faced with a possible armed intervention, Quirós decided to quit the office and on September 20 was replaced by Francisco Aguilar Barquero.