Castro
Castro is a Romance language word that originally derived from Latin castrum, a pre-Roman military camp or fortification (cf: Greek: kastron; Proto-Celtic:*Kassrik; Breton: kaer, *kastro). The English-language equivalent is chester.
It may refer to:

People
Castro (surname), a surname (including a list of people with the name)
Fidel Castro (1926–2016), dictator of Cuba, former First Secretary of the Communist Party of Cuba
José Castro (1808–1860), Mexican Californio politician, statesman, and general who served as interim Governor of Alta California and later Governor of Baja California
Julián Castro (Venezuelan politician) (1810–1875) a Venezuelan military officer and President of Venezuela between 1858 and 1859
Julian Castro (b. 1974), American politician from San Antonio
Raúl Castro (b. 1931), younger brother of Fidel Castro, former First Secretary of the Communist Party of Cuba
Xiomara Castro (b. 1959), president of Honduras and wife of former Honduran president Manuel Zelaya
de Castro, a Portuguese surname
House of Castro, a Spanish noble family
Prince Carlo, Duke of Castro, claimant to the headship of the royal House of Bourbon-Two Sicilies
A nickname of Martin Castrogiovanni (born 1981), Argentine-born Italian rugby player
Castro (footballer), the mononym of Santiago Castro Anido, Spanish footballer

Places and jurisdictions
Roman Catholic Diocese of Castro (disambiguation)
Castro Barros (disambiguation)
Castro Street (disambiguation)
Castro City (disambiguation)

Brazil
Castro, Paraná, a municipality in the state of Paraná in the Southern Region of Brazil.

Chile
Castro, Chile

Greece
Curiate Italian designation for the Latin Catholic titular bishopric of Moglæna, now Almopia, a municipality of the Pella regional unit in Greek Macedonia.

Italy
Castro, Apulia, a comune (municipality) in the province of Lecce
the former Roman Catholic Diocese of Castro di Puglia, now a Latin Catholic titular see
Castro, Lazio, a destroyed town in the province of Viterbo
the former Roman Catholic Diocese of Castro del Lazio, now a Latin Catholic titular see
Castro, Lombardy, a comune in the province of Bergamo
Castel di Castro, 13th century fortified city at the site of modern Cagliari, Sardinia
A former town within the comune of Oschiri, Sardinia
the former Roman Catholic Diocese of Castro di Sardegna, now a Latin Catholic titular see

Mexico
Castro, Baja California

Spain
Castro (Soria)
Castros (Spain)
Castro Urdiales, Cantabria

Switzerland
Castro, Ticino

United States
Castro County, Texas
Castro Cove, an embayment of the San Pablo Bay in Richmond, California
Castro Creek, a creek in Richmond, California
Castro Street Station, a Metro station in San Francisco, California
Castro Theatre, a movie theater in San Francisco, California
The Castro, San Francisco, a neighborhood in San Francisco, California
Castro Valley, California, a census-designated place in Alameda County

Other uses
Castro culture, Iron-Age, Bronze-Age and Celtic culture in the Northern Iberian Peninsula
Castros in Spain
Castro (village), types of settlements of the Castro culture
Castro (clothing), an Israel-based clothing company
"Castro" (song), a 2016 song by Yo Gotti
Wars of Castro, conflict between the Papacy and the Farnese dukes of Parma
Castro FC, Spanish football team
Jose Castro House, historic Monterey Colonial adobe house built in 1840

See also
Castor (disambiguation)
Castro brothers (disambiguation)
Castrum
De castro family (disambiguation)
Duke of Castro (disambiguation)
Gastro-, common English-language prefix derived from the ancient Greek γαστήρ gastēr ("stomach")
Kastro (disambiguation)