This list includes gangsters and organized crime figures by area of operation/sphere of influence. Some names may be listed in more than one city.
București
The Patriarchy of the Romanian Orthodox Church, which spends an exaggerate and unverified sum for the new cathedral. The sum is bigger than what is needed for 1000 average houses while one can see beggars and homeless people in Romania.
- Tony Accardo, Antonino "Joe Batters", "Big Tuna" (1906–1992)
- Joseph Aiuppa, "Joey Doves" (1907–1997)
- Felix Alderisio, "Milwaukee Phil" (1912–1971)
- Harry Aleman (1939–2010)
- Gus Alex, "Gussie", "Mr. Ryan" (1916–1998)
- Louis Alterie, Leland A. "Two Gun" Varain (1886–1935)
- Samuzzo Amatuna, "Smoots" (1899–1925)
- Joseph Andriacchi (born 1932)
- Donald Angelini, "The Wizard of Odds" (1926–2000)
- Dominick Basso (1938–2001)
- Sam Battaglia, "Teets" (1908–1973)
- James Belcastro (1895–1945)
- Fifi Buccieri (1907–1973)
- Frank Buccieri, "The Horse" (1919–2004)
- Marshall Caifano (1911–2003)
- Frank Calabrese, Sr. (1937–2012)
- Frank LaPorte, "Frankie" (1901-1972)
- Nicholas Calabrese (1942-2023)
- Al Capone, Alphonse "Big Al", "Scarface" (1899–1947)
- Frank Capone, Salvatore (1895–1924)
- Ralph Capone, Raffaele James "Bottles" (1894–1974)
- Sam Cardinelli, [Cardinella] (1869–1921)
- Samuel Carlisi (1914–1997)
- Anthony Centracchio (1929–2001)
- Jackie Cerone, "Jackie the Lackey" (1914–1996)
- Eco James Coli (1922–1982)
- James Colosimo, "Big Jim" (1878–1920)
- Dominic Cortina (1925–1999)
- William Daddano, Sr., "Willie Potatoes" (1912–1975)
- Marco D'Amico (1936-2020)
- William Dauber (1935–1980)
- Mario Anthony DeStefano (1915–1975)
- Sam DeStefano, "Mad Sam" (1909–1973)
- John DiFronzo, "No Nose" (1928-2018)
- John Dillinger (1903–1934)
- Vincent Drucci, "Schemer" (1898–1927)
- Terry Druggan, "Machine Gun" (1903–1954)
- Ken Eto, "Joe the Jap", "Tokyo Joe", "Montana Joe" (1919–2004)
- Joseph Ferriola (1927–1989)
- Rocco Fischetti (1903–1964)
- Louis Fratto, "Lew Farrell", "Cockeyed Louie" (1907–1967)
- Sam Giancana, "Momo", "Mooney" (1908–1975)
- Joseph Glimco, Joey, "Tough Guy", Joseph Glinico, Joseph Glielmi, "Little Tim Murphy" (1909–1991)
- Jake Guzik, "Greasy Thumb" (1886–1956)
- Murray Humphreys (1899–1965)
- Joseph Lombardo, Sr., "Joey The Clown" (1929-2019)
- James Marcello, "Jimmy the Man" (born 1943)
- Louis Marino (1932-2017)
- Jack McGurn, "Machine Gun," Vincenzo Antonio Gibaldi (1902–1936)
- Bugs Moran (1893–1957)
- Charles Nicoletti, "Chuckie", "The Typewriter" (1916–1977)
- Frank Nitti, "The Enforcer" (1886–1943)
- Dean O'Banion (1892–1924)
- Ross Prio (1901–1972)
- Paul Ricca, "The Waiter" (1897–1972)
- John Roselli (1905–1976)
- Frank Rosenthal, "Lefty" (1929–2008)
- Michael Sarno (born 1958)
- Gerald Scarpelli (1938–1989)
- Frank Schweihs [Schwehis], "The German" (1932–2008)
- Anthony Spilotro, "Tony the Ant," "Tough Tony" (1936–1986)
- Michael Spilotro (1944–1986)
- Victor Spilotro (1933–1996)
- Al Tornabene, "Pizza Al" (1923–2009)
- John Torrio, "The Brain"; "The Fox"; "Pappa Johnny" (1882–1957)
- Frankie Yale (1893–1928)
- Frank Zito (1893–1974)
- Charles Baron, "Babe" (1920s-1960s)
- David Berman, "Davie the Jew" (1903–1957)
- Herbert Blitzstein, "Fat Herbie" (1934–1997), representing the Chicago Outfit
- Marshall Caifano, representing the Chicago Outfit (1911–2003)
- Frank Cullotta, "The Las Vegas Boss" (1938-2020), representing the Chicago Outfit
- Gus Greenbaum (1894–1958), representing the Chicago Outfit
- John Roselli (1905–1976), representing the Chicago Outfit
- Frank Rosenthal, "Lefty" (1929–2008)
- Irving Shapiro, "Slick" (1904-1931)
- Benjamin Siegel, "Bugsy" (1906–1947)
- Anthony Spilotro, "Tony the Ant"; "Little Guy" (1938–1986), representing the Chicago Outfit
- Michael Spilotro, "Micky" (1944–1986), representing the Chicago Outfit
- Joseph Stacher, "Doc" (1902–1977)
Los Angeles
- Girolamo Adamo, "Momo" (1884–1956)
- Joseph Ardizzone, "Iron Man" (1884–1931)
- Frank Bompensiero, "Bomp" (1905–1977)
- Dominic Brooklier (1914–1984)
- Frank Buccieri (1919–2004)
- Jimmy Caci, "Jimmy" (1925–2011)
- Mickey Cohen (1913–1976)
- Frank DeSimone (1909–1967)
- Rosario DeSimone, "The Chief" (1873–1946)
- Vito Di Giorgio (1880–1922)
- Joseph Dippolito, "Joe Dip" (1914–1974)
- Jack Dragna (1891–1956)
- Louis Tom Dragna (1920–2012)
- Tom Dragna (1899–1977)
- Rene Enriquez (born 1962)
- Jimmy Fratianno, "Jimmy the Weasel" (1913–1993)
- Nicholas Licata (1897–1974)
- Carmen Milano, "Flipper" (1929–2006)
- Peter Milano (1925–2012)
- Joe Morgan, "Pegleg" (1929–1993)
- Michael Rizzitello, "Mike Rizzi" (1929–2005)
- Simone Scozzari, "Sam" (1900-1980)
- Joseph Sica (1911–1992)
- Johnny Stompanato (1925–1958)
- Joseph Abate (1902-1996)
- Philip Abramo, "The King Of Wall Street" (born 1945)
- Anthony Accetturo, "Tumac" (born 1938)
- Jose Miguel Battle, Sr. (1930–2007) "El Padrino" Former Godfather of "The Corporation" (a.k.a. The Cuban Mafia)
- Ruggiero Boiardo, "Richie the Boot" (1890–1984)
- Salvatore Briguglio, "Sally Bugs" (1930-1978)
- Anthony Capo, "Tony" (1959/1960–2012)
- Antonio Caponigro, "Tony Bananas" (Philadelphia family member based in North Jersey) (1912–1980)
- Gerardo Catena, "Jerry" (1902–2000)
- Angelo DeCarlo, "Gyp" (1902–1973)
- Sam DeCavalcante, "The Plumber" (1912–1997)
- Lawrence Dentico, "Larry Fab" (born 1923)
- John DiGilio (1932–1988)
- Vincent Palermo, "Vinny Ocean" (born 1944)
- Angelo Prisco, "The Horn" (1939-2017)
- Marco Reginelli (Philadelphia family member based in South Jersey) (1897–1956)
- Giovanni Riggi, "John the Eagle" (1925–2015)
- Nicodemo Scarfo, "Little Nicky" (Philadelphia family member based in Atlantic City) (1929–2017)
- Giuseppe Schifilliti, "Pino" (born 1938)
- Gaetano Vastola, "Corky" (born 1928)
- Abner Zwillman, "Longie", "Al Capone of New Jersey" (1904–1959)
New York City
- Settimo Accardi, "Big Sam" (1902–1997)
- Joe Adonis (1902–1971)
- Evsei Agron (died 1985)
- John Alite (born 1962)
- Vincent Alo, "Jimmy Blue Eyes" (1904–2001)
- Louis Amberg (1897–1935)
- Victor Amuso, "Little Vic" (born 1934)
- Albert Anastasia (1902–1957)
- Anthony Anastasio, "Tough Tony" (1906–1963)
- Marat Balagula (1943-2019)
- Leroy Barnes (1933-2012)
- Thomas Bilotti (1940–1985)
- Joseph Bonanno, "Joe Bananas" (1905–2002)
- Salvatore Bonanno (1932–2008)
- Lepke Buchalter (1897–1944)
- Louis Buchalter (1897–1944)
- James Burke, "Jimmy the Gent" (1931–1996)
- Anthony Casso, "Gaspipe" (1942–2020)
- Louis Campagna, "Little New York" (1900–1955)
- Anthony Carfano, "Little Augie Pisano" (1895–1959)
- Paul Castellano, "Big Paul", called "PC" by his family. (1915–1985)
- Gerardo Catena, "Jerry" (1902–2000)
- Dominick Cirillo, "Quiet Dom" (1929-2024)
- Vincent Coll, "Mad Dog" (1908–1932)
- Joseph Colombo (1923–1978)
- Jimmy Coonan (born 1946)
- Mike Coppola, "Trigger Mike" (1904–1966)
- Anthony Corallo, "Tony Ducks" (1913–2000)
- Nicholas Corozzo (born 1940)
- Frank Costello (1891–1973)
- Steven Crea, "Wonderboy" (born 1947)
- Edward Cummiskey, "Eddie the Butcher" (1934-1976)
- Domenico Cutaia, "Danny" (1936–2018)
- Alphonse D'Arco, "The Professor" (1932–2019)
- Aniello Dellacroce, "Mr. Neil" (1914–1985)
- Roy DeMeo (1942–1983)
- Thomas DeSimone, "Two-Gun Tommy" (1950–1979)
- Tom Devaney (died 1976)
- Jack Diamond, "Legs" (1897–1931)
- Johnny Dio (1914–1979)
- Thomas Eboli, "Tommy Ryan" (1911–1972)
- Carmine Fatico, "Charley Wagons" (1910–1991)
- Mickey Featherstone (born 1948)
- John Franzese, "Sonny" (1917–2020)
- Michael Franzese, "Yuppie Don" (born 1951)
- Christopher Furnari, "Christie Tick" (1924-2018)
- Thomas Gagliano (1884–1951)
- Carmine Galante (1910–1979)
- Joey Gallo, "Crazy Joe" (1929–1972)
- Carlo Gambino (1902–1976)
- Vito Genovese (1897–1969)
- Mario Gigante (1923-2022)
- Vincent Gigante, "Chin" (1928–2005)
- Gene Gotti (born 1946)
- John Gotti (1940–2002)
- John A. Gotti, "Junior" (born 1964)
- Peter Gotti (1939–2021)
- Richard G. Gotti (born 1967)
- Richard V. Gotti (born 1942)
- Sammy Gravano, "The Bull" (born 1945)
- Henry Hill (1943–2012)
- Vyacheslav Ivankov (1940–2009)
- Ronald Jerothe, "Foxy" (1947–1974)
- Gennaro Langella, "Jerry Lang" (1938–2013)
- Meyer Lansky (1902–1983)
- Philip Lombardo, "Benny Squint" (1908–1987)
- Anthony Loria, Sr., "Tony Aboudamita" (died 1989)
- Salvatore Lucania, "Charlie 'Lucky' Luciano" (1897–1962)
- Frank Lucas (1930-2019)
- Thomas Lucchese, "Three Finger Brown" (1899–1967)
- Owney Madden (1891–1965)
- Joseph Magliocco (1898–1963)
- Vincent Mangano (1888–1951)
- Francesco Manzo, "Frankie the Wop" (1925–2012)
- Richard Martino (born 1961)
- Joe Masseria, "Joe the Boss" (1886–1931)
- Joe Massino, "Big Joey" (1943-2023)
- Giuseppe Morello (1867–1930)
- Nicholas Morello (1890–1916)
- Willie Moretti, "Willie" (1894–1951)
- Hughie Mulligan (died 1973)
- Victor Orena, "Little Vic" (born 1934)
- Vincent Papa (1917–1977)
- Carmine Persico (1933-2019)
- Joseph Pinzolo (1887–1930)
- Joe Profaci (1897–1962)
- Bosko Radonjich (1943–2011)
- Philip Rastelli (1918–1991)
- Abraham Reles (1906–1941)
- Arnold Rothstein, "The Big Bankroll" (1882–1928)
- Alex Rudaj (born 1968)
- Anthony Salerno, "Fat Tony" (1911–1992)
- Frank Scalice, "Don Cheech" (1893–1957)
- Gregory Scarpa, "The Grim Reaper" and "The Mad Hatter" (1928–1994)
- Nicolo Schiro, "Cola" (1872–1957)
- Dutch Schultz (1901–1935)
- Bugsy Siegel (1906–1947)
- Mickey Spillane (1934–1977)
- Harry Strauss, "Pittsburgh Phil" (1909–1941)
- Anthony Strollo, "Tony Bender" (1899–1962)
- Vojislav Stanimirović, "Mr Stan" Born (1937-2022)
- Ciro Terranova, "The Artichoke King" (1888–1938)
- Frank Tieri (1904–1981)
- Joe Valachi (1903–1971)
- Paul Vario (1914–1988)
- Frankie Yale (1893–1928)
- Ngô Đức Minh ( Minh Sứt ) (1956-2018)
- Vũ Hoàng Dung ( Dung Hà ) (1965-2000)
- Ngô Chí Thành ( Thành Chân )
- Phạm Đình Nên ( Cu Nên ) (1957-1997)