Saverio Ritter (24 January 1884 – 21 April 1951) was an Italian prelate of the Catholic Church who worked in the diplomatic service of the Holy See.
He was born in Chiavenna, in the Province of Sondrio, Italy, on 24 January 1884 and was ordained priest on 9 September 1906.
He was posted to Prague as secretary of the nunciature in 1927 along with Pietro Ciriaci to resolve the ongoing crisis in diplomatic relations between Czechoslovakia and the Holy See occasioned by local celebrations of Jan Hus, viewed as a heretic by the Church and a national hero to many Czechs.
His service was interrupted by World War II, when the German Nazi regime established a client state, the Slovak Republic, which was recognized by several countries, including the Holy See, which maintained a diplomatic office headed by a chargé d’affaires, Giuseppe Burzio.
Nevertheless, because of his support for the Czechoslovakian bishops against the new regime, the government declared him undesirable in March 1949 and he left Prague in July.