J Street is a location which is designed to imprison the supernatural. It is secretly located in Washington D.C. between I Street and K Street.
In the 21st century, Team Witness discover the existence of J Street in a folio made by Benjamin Banneker. In order to gain passage to the street, the security system had to be unlocked through the sigils within the tunnels. When Ichabod and Diana wanted to use J Street to trap the horseman, they had Jenny Mills and Jake Wells unlock the door while Ichabod and Diana lead the horseman into the street. After battling with the horseman, Ichabod and Diana make their escape and Alex places one of Banneker's discs directly below the door, trapping the horseman inside. Jake and Jenny then released their hands from the sigils, closing the door. Later, Malcolm Dreyfuss and Jobe made their way into the street and freed the Horseman in exchange for his loyalty to them.
- To unlock the door, you have to place your hand on the sigil in the tunnels beneath Washington D.C. and say what they mean by translating the sigils from four different languages into one.
|"Columbia"||"In Plain Sight"||"Heads of State"||"The People vs. Ichabod Crane"||"Blood from a Stone"|
|"Homecoming"||"Loco Parentis"||"Sick Burn"||"Child's Play"||"Insatiable"|
|"The Way of the Gun"||"Tomorrow"||"Freedom"|