Abstract: A door locking system is provided herein. The door locking system includes an elongated foot bolt. The foot bolt is dimensioned to be received in a recess or a strike in a floor. The door locking system also includes a housing. The housing has upper and lower ends, with the upper and lower ends having aligned through-openings for slidably receiving the foot bolt. The housing also has opposing faces having through-openings for receiving respective attachment screws. Additionally, the system includes a biasing spring. The biasing spring is placed around a portion of the foot bolt, with the biasing spring being held in compression within the housing. The system is configured so that the foot bolt may be depressed downward through the aligned through-openings in the upper and lower ends of the housing for locking a door, but then released by depressing a detent.