| Region |
Gang (Members) |
Current/Last Boss |
Notable Past Members |
| New York |
The Westies
(10-15) |
John "Little Jackie" Coonan, III |
Jimmy Coonan, Francis "Mickey" Featherstone, Eddie "the Butcher" Cummiskey, Jimmy "Mac" McElroy, Owney "the Killer" Madden, Mickey Spillane, Tom Devaney, Billie Beattie, Tommy Hess, Richard "Mugsy" Ritter, John "Jackie" Coonan, Jr., Richie Ryan, Bosco Rondonjich, Peter "Squint" Sheridan, John "Cockeye" Dunn, Kevin Kelly, Kenny Shannon, Billy Bokun, Johnny Halo, Eddie Sullivan, Tom Kapatos |
| Boston |
Winter Hill Gang
(40-50) |
George "Georgie Boy" Hogan |
Jimmy "Whitey" Bulger, John Shea, Howie Winter, James "Buddy" McLean, Salvatore "Sal" Sperlinga, Vincent "Jimmy the Bear" Flemmi, Stevie "the Rifleman" Flemmi, Johnny Martorano, Eddie "Mac" MacKenzie, Patrick Nee, Kevin "Two" Weeks, Joseph "Joe Mac" McDonald |
| Cleveland |
Celtic Club
|
Danny "the Irishman" Greene (1977) |
John Nardi, Keith Ritson, Kevin McTaggart, Brian O'Donnell, Danny Green Jr., Bill Duffy |
| St. Louis |
Egan's Rats (300-400, 1912)
|
William "Dint" Colbeck (1924) |
Thomas "Snake" Kinney, Thomas Egan, Harry "Cherries" Dunn, John "Pudgy" Dunn, William "Skippy" Rohan, David "Chippy" Robinson, Frank Hackethal, Fred "Killer" Burke |
| Chicago |
North Side Gang
|
N/A |
Dion "Deanie" O'Banion, George "Bugs" Moran, Myles O'Donnell, Francis Cavanaugh, Roger Touhy, Frank McErlane, James "Big Jim" O'Leary, Terry "Machine Gun" Drugan |
| Various |
Connected Irishman
|
N/A |
Jimmy Burke, Henry Hill, Eddie Boyle, Joe Sullivan, Francis Sheeran |
| Philadelphia |
K & A Gang (North Philly Mob)
|
N/A |
N/A |
| Elsewhere |
Other Irish Gangsters
|
N/A |
John Patrick Looney, "Dapper" Danny Hogan, Danny Walsh |
| New York |
The White Hand Gang
|
N/A |
Dennis "Dinny" Meehan, "Wild" Bill Lovett, Richard "Peg Leg" Lonegan |
