The Bronx was a borough of New York City.
Thomas Bruce, in his guise as American UNIT soldier Bruce Davis, told Brigadier Lethbridge-Stewart that UNIT's American branch had been in the Bronx since they became operational. (PROSE: The Devil Goblins from Neptune)
Max Vilmio told Don Fabrizzio that he was not "some punk running a liquor store in the Bronx." (PROSE: The Ghosts of N-Space)
According to one account, Peri Brown told the Sixth Doctor that if he wanted to go somewhere really desolate, he should try the Bronx. (PROSE: The Twin Dilemma)