|Birthplace||Upstate New York|
In his position as a Senior Agent with the Bureau of Prohibition in the Department of Internal Revenue Nelson Van Alden tackles his job with the fervor of a man possessed. He is deeply religious and is married to Rose Van Alden. Van Alden is under the command of Supervisor Elliot and partnered with Agent Eric Sebso .
- Main article: Nelson Van Alden Season 1
- Main article: Nelson Van Alden Season 2
- Main article: Nelson Van Alden Season 3
- Rose Van Alden - First wife
- Abigail Van Alden - Daughter
- Lucy Danziger - Lover, mother of Abigail
- Sigrid - Second wife, under assumed identities as Mr. and Mrs. Mueller
- Baby Boy Van Alden - Son
Law enforcement career
- Supervisor Elliot - Commanding officer
- Agent Sebso - Subordinate (Former)
- Agent Clarkson - Subordinate
- Agent Sawicki - Subordinate
- Nucky Thompson - Investigatory target
- Arnold Rothstein - Investigatory target
- Jimmy Darmody - Investigatory target, informant (former)
- Mickey Doyle - Informant
- Margaret Schroeder - Informant (former)
- Esther Randolph - Assistant US Attorney prosecuting Nucky
- Clifford Lathrop - Department of Justice investigator assigned to Randolph
- Dick Halsey - Randolph's clerk
- Mrs. Mauer: "And just now -"
- Nelson: "Yes?"
- Mrs. Mauer: "A blue limousine pulls up and carts them off - her and her children"
- Nelson: "A Rolls?"
- Mrs. Mauer: "How's that?"
- Nelson: "The limousine - a Rolls Royce?" ("Family Limitation")
- "THOU HAST FULLFILLED, THE JUDGEMENT OF THE WICKED!!"
- "The roast tastes good."
- "I brought lemons."
- Mickey Doyle: "I put this whole operation together. And what do I receive? A poke up my ass."
- Nelson: "Painful." ("Under God's Power She Flourishes")
|Season one appearances|
|Boardwalk Empire||The Ivory Tower||Broadway Limited||Anastasia|
|Nights in Ballygran||Family Limitation||Home||Hold Me in Paradise|
|Belle Femme||The Emerald City||Paris Green||A Return to Normalcy|
|Season two appearances|
|21||Ourselves Alone||A Dangerous Maid||What Does the Bee Do?|
|Gimcrack & Bunkum||The Age of Reason||Peg of Old||Two Boats and a Lifeguard|
|Battle of the Century||Georgia Peaches||Under God's Power She Flourishes||To the Lost|
|Season three appearances|
|"Resolution"||"Spaghetti and Coffee"||"Bone for Tuna"||"Blue Bell Boy"|
|"You'd Be Surprised"||"Ging Gang Goolie"||"Sunday Best"||"Season 3, Episode 8"|
|"Season 3, Episode 9"||"Season 3, Episode 10"||"Season 3, Episode 11"||"Season 3, Episode 12"|