And that's only the main characters in the first season... in the East Coast.
This page links to the subpages containing descriptions and tropes associated with prominent recurring cast members from Boardwalk Empire.
Beware of uncovered spoilers, only spoilers from the fourth and fifth season are meant to be blacked out.
- Thompson Familynote Enoch Malachi "Nucky" Thompson, Elias "Eli" Thompson, Ethan Thompson, June Thompson, William "Willie" Thompson, Eleonore Thompson, Susan Thompson, Mabel Thompson
- Schroeder and Rohan Familiesnote Margaret Catherine Sheila Rohan Schroeder Thompson, Theodore "Teddy" Thompson, Emily Thompson, Hans Schroeder, Eamoinn Rohan, Nuala Rohan, Bethany "Beth" Rohan, Aylesh Rohan
- Darmody Family & Associatesnote James Edison "Jimmy" Darmody, Gillian Darmody, Angela Darmody, Tommy Darmody, Richard Harrow
- The Commodore's Circlenote Louis "Lou" Kaestner a.k.a. "The Commodore", Luann Pratt, Leander Cephas Whitlock, Jackson Parkhurst, Mr. Darlington, Sheriff Jacob Lindsay, Pat Halligan
- The Northsidenote Albert "Chalky" White, Dunn Purnsley, Samuel Crawford, Lenore White, Lester White, Maybelle Ann White, Adeline "Addi" White
- Federal Law Enforcement Personnelnote Esther Randolph, J. Edgar Hoover, Eric Sebso, Frederick "Fred" Elliot, Stanley "Stan" Sawicki, Agent Clarkson, Warren Knox
- Politiciansnote Edward Bader, Frank Hague, Walter Edge, Harry Daugherty, Jess Smith, Andrew William Mellon
- People in Nucky's Organization and Payrollnote Mieczyslaw "Mickey Doyle" Kuzik, Owen Sleater, William "Bill" McCoy, Sally Wheet, Sheriff's Deputy Raymond "Ray" Halloran, Damien Fleming, James "Jim" Neary, George O'Neil, Al Boyd, Paddy Ryan, Isaac "Gicky" Ginsburg, Edward Anselm "Eddie" Kessler, Katy, Harlan
- Chicago Gangstersnote Former BIR Agent Nelson Van Alden A.K.A George Muller, Alphonse "Al" Capone, Giovanni "Johnny" Torrio, Giacomo "Big Jim" Colosimo, Jake Guzik, Ralph "Bottles" Capone, Frank Capone, Charles Dean "Deanie" "Deano" O'Banion, Henry Earl J. "Hymie Weiss" Wojciechowski, Charlie Sheridan, Liam
- New York City Gangstersnote Arnold "A. R." Rothstein, Meyer Lansky, Benjamin "Benny" Siegel, William "Bill" Fallon, Giuseppe "Joe the Boss" Masseria, Salvatore "Sal" "Charlie" "Lucky" Luciano, Giuseppe Colombano "Gyp" Rosetti, Tonino Sandrelli, Frankie Yale, Doctor Valentin Narcisse, Daughter Maitland, Salvatore Maranzano
- Other Out-of-Town Gangstersnote Munya "Manny" Horvitz, Waxey Gordon, The D'Alessio Brothers, Rowland Smith, George Remus, Vincenzo Petrucelli
- Mistressesnote Lucille "Lucy" Danziger, Lillian "Billie" Kent, Nan Britton, Annabelle, Pauline
- Other Charactersnote Julia Sagorsky, Paul Sagorsky, Babette, Isabelle Jeunet, Mrs. McGarry, Harry Prince, Father Ed Brennan, Eddie "Izzy" Cantor, Rose van Alden, George Baxter, John McGarrigle, Roger McAllister, Roy Phillips, Joseph P. Kennedy, Sigrid Mueller, Pearl, Gaston Bullock Means, Oscar Boneau, Carolyn Rothstein, Milton