List of Bosses killed in Sicilian and American Mafia

7 July 1930 - Angelo Gagliano first boss of Corleone
2 Aug 1955-Michele Navarra-Corleone.His death was the beginning of the rise of Luciano Liggio and the modern Corleonesi clan
First Mafia War

* indicates a neighborhood of Palermo

Sicilian Mafia

December 26,1962 - Calcedonio Di Pisa - La Noce(*) family.His death on the order of Angelo La Barbera (killed in prison in 1975) was the beginning of the First Mafia war
April 26,1963 - Cesare Manzella - Cinisi
June 27, 1963 - Emanuele Leonforte - Ficarazzi
August 17, 1970 - Vito Gattuso - Ravanusa
30 April 1971 - Antonino Matranga - Resuttana(*)
14 September 1971 Francesco Ferrante township Tommaso Natale
15 February 1978: Ignazio Scelta - Auditore-Passo di Rigano(*)
16 March or 8 April 1978: Francesco Madonia - Vallelunga Pratameno
May 30th 1978 - Giuseppe Di Cristina - Riesi.Di Cristina he had begun to collaborate with the Italian state knowing that the Corleonesi wanted to kill him, despite his death his statements were used in the Maxi Trial together with those of Contorno and Bagarella.
1978 (month and day unkown) Filippo Giacalone - San Lorenzo(*)
August 5, 1978: Nicola Di Giovanni - Sambuca di Sicilia
September 8th 1978 - Giuseppe Calderone - Catania
June 6th 1980 - Carmelo Salemi - Agrigento killed and buried with his car
July 29, 1980 -Antonino Federico Morabito - Paternò
20th September 1980 - Giuseppe Cirrito - Cerda
October 5th 1980: Stefano Marrella - Montallegro
February 9th 1981: Liborio Terrasi - Cattolica Eraclea
March 11th 1981 - Giuseppe Panno - Casteldaccia
23 March 1981 - Giuseppe Settecasi - Alessandria della Rocca

23 aprile 1981 - Stefano Bontate - Villagrazia(*) - His death on the order of Totò Riina was the beginning of the Second Mafia war
11 maggio 1981 - Salvatore Inzerillo - Passo di Rigano(*)
3 giugno 1981 - Antonino Scalisi - Catania
15 giugno 1981 - Ignazio Gnoffo - Palermo Centro now Porta Nuova(*)
18 agosto 1981 - Antonino Badalamenti, Gaetano's cousin.Badalamenti had become the leader of Cinisi after the expulsion of his cousin, towards whom he harbored a deep resentment. However, he refused to lead Gaetano into a trap, since he was still a member of his family. For this reason he was considered unreliable and his elimination was decreed, which was completed thanks to the betrayal of his great friend Rosario Riccobono
2 settembre 1981: Leonardo Caruana - Siculiana.Caruana was killed as he left an apartment in Palermo where he had gone for his son's wedding. From this moment on, the members of the Cuntrera-Caruana clan, all recipients of death sentences from the Corleonesi, hastily left Sicily.

September 15, 1981 - Giuseppe Palmeri - Santa Ninfa
September 29, 1981 - Calogero Pizzuto - Castronovo di Sicilia
1981: (month and day unkown) following the San Giovanni Gemini massacre against Calogero Pizzuto, Riina decrees a series of murders in order to silence the moderate wing in the Lercara-Castronovo-Vicari area and reorganize the relative families. The mandate was moved from Castronovo di Sicilia to Caccamo and Ciccio Intile, very loyal to Riina, assumed the regency. The first of these murders is that of Francesco Montalto, representative of the Lercara Friddi family linked to Pizzuto.
September 30,1981:Antonino Buccellato - Castellammare del Golfo
November 16 or 17, 1981 - Luigi Calì - San Cataldo
13 January 1982 - Francesco Cinardo - Mazzarino
January 16th 1982: in Milan, murder of Corrado Manfredi, head of the Cursoti clan, killed by his own men because he was considered too close to the Corleonesi.
May 20, 1982: Beniamino Leto - Sant'Angelo Muxaro
June 16, 1982 - Alfio Ferlito - powerful boss of Catania and the worst enemy of Benedetto Santapaola ally of Corleones
November 20th 1982 - Antonio Salvatore Minore - Trapani
November 30, 1982 - Rosario Riccobono - Partanna-Mondello (*)
30th November - Salvatore Scaglione - La Noce(*)
February 3, 1983 - Mariano Marsala - Vicari
April 13th 1983 - Giuseppe Misuraca - Camporeale
April 21st 1983 - Salvatore and ErasmoValenza bosses of Borgetto
June 5th 1983: Francesco Sorci - Villagrazia
30 July 1983: killed along with his nephew Giacomo, Carmelo Colletti, head of the Ribera family and provincial representative of Agrigento, a close ally of the Corleonesi. The murder was carried out by Calogero "Lillo" Lauria, a former associate of Colletti and a member of the Raffadali family who had made an agreement with Badalamenti, betraying the Corleonesi. Riina herself orders the extermination of the Lauria group in revenge.
September 9, 1983 - Giuseppe Cirasa - Victory
February 3, 1983 - Mariano Marsala - Vicari
October 1983: Favara boss Filippo Di Stefano, known as Mureddu, disappears via white gun. He was the leader of the so-called "favara mavericks".
June 4, 1984: Calogero Svolto - Palma di Montechiaro
June 27, 1984: Vito Gambino, old boss of the Ravanusa family
September 29, 1987 - Mario Prestifilippo briefly the boss of the Ciaculli Mafia Family
7 May 1990 Natale L'Ala, boss of Campobello di Mazara who escaped various attacks in the 1980s. Killed by Matteo Messina Denaro
15 July 1992 - Vincenzo Milazzo - Alcamo


American Cosa Nostra

Pre-Commission

November 24, 1913 — Vito Adamo (Detroit)
January 3, 1919 - Antonio "Tony" Gianola (Detroit)
September 24, 1919 - Gregorio Conti (Pittsburgh)
October 2, 1919 - Salvatore "Sam" Gianola (Detroit)
May 11, 1920 - Vincenzo Colosimo (Chicago)
September 28, 1921 - Giovanni "John" Vitale (Detroit)
October 13, 1927 - Joseph Lonardo (Cleveland)
October 10, 1928 - Salvatore "Toto" D'Aquila (Gambino)
June 11, 1929 - Salvatore Todaro (Cleveland)
August 6, 1929 - Stefano Monastero (Pittsburgh)
February 14, 1930 - Salvatore "Singing Sam" Catalanotte (Detroit)
February 26, 1930 - Gaetano "Tommy" Reina (Lucchese)
June 1, 1930 - Gaspar "The Peacemaker" Milazzo (Detroit)
July 5, 1930 - Joseph "Big Joe" Porrello (Cleveland)
July 10, 1934 - John Lazia (Kansas City)
September 5, 1930 - Bonaventura "Joseph" Pinzolo
February 7, 1931 - Cesare Lamare (Detroit)
April 15, 1931 - Giuseppe "Joe the Boss" Masseria (Genovese)
September 10, 1931 - Salvatore Maranzano (Bonanno)

After Commission creation

September 13, 1931 - Giuseppe "Yeast Baron" Siragusa (Pittsburgh)
October 15, 1931 - Joseph "Joe Iron Man" Ardizzone (Los Angeles)
August 8, 1932 - John Bazzano (Pittsburgh)
February 18, 1933- Joe "Little Caesar" Roma (Denver)
August 17, 1936 - John "Nazzone" Avena (Philadelphia)
October 23, 1940 - Ignacio Antinori
April 6, 1950 - Charles Binaggio (Kansas City)
April 19, 1951, declared dead October 30, 1961 - Vincenzo (Vincent) Mangano (Gambino)
March 31, 1955 - Stefano Badami (Elizabeth)
October 25, 1957 - Albert Anstasia (Gambino)
July 12, 1979 - Carmine "Lilo" Galante (Bonanno de facto boss)
March 21, 1980 - Angelo "The Gentle Don" Bruno (Philadelphia)
March 15, 1981 - Philip "the Chicken Man" Testa (Philadelphia)
December 16, 1985 - Paul Castellano (Gambino)

October 25, 1957 - Albert Anstasia (Gambino)
May 22, 1978 - Joseph Colombo (Colombo)

June 19, 1975 - Salvatore (Sam) Giancana (Giangana) (Chicago)

Disappeared April 19, 1951, declared dead October 30, 1961 -Vincenzo (Vincent) Mangano (Gambino)

Giancana wasntcthe boss when was killed.

Colombo wasnt the boss anymore when died.

What is your source for Petto and Terranova being boss?

Wikipedia that say that Petto fled NY and come to Scranton where.created an operation before be killed so I.put the name even was boss for short time.

Era Boss, è stato ucciso. Il tuo post non specifica che deve essere il capo al momento della sua morte.

Sorry CNote if it isn't written in the post, in any case only those who died as bosses go on the list. And can easly write in english.

There isn’t any primary evidence for him being a boss, so best not to include him or Terranova. Or at least do a possible boss category.

Ok thanks.

Colorado
Pellegrino Scaglia 1922
Peter Carlino 1931

Los Angeles
Vito DiGiorgio 1922

St. Louis
Frank Agrusa 1944