The cardinal electors in the 1939 papal conclave numbered 62 and all of them participated. They are arranged by region, and within each alphabetically.

Carlo Salotti was an Italian cardinal of the Roman Catholic Church. He served as Secretary of the Congregation for the Propagation of the Faith from 1930 until 1935 and as prefect of the Congregation of Rites from 1938 until his death, and was elevated to the cardinalate in pectore in 1933.