Abstract: An overhead livestock enclosure washing system for cleaning the pens of a livestock confinement building. The overhead livestock enclosure washing system includes a track member coupled to the ceiling of the building. A mobile unit operationally engages the track member and selectively advances along the track member. The mobile unit is for being in fluid communication with a fluid source to spray fluid into the interior space of the livestock confinement building to clean the interior space of the building when the mobile unit advances along the track member. A base unit is positioned on the floor of the livestock confinement building. The base unit is in fluid communication with the mobile unit whereby the base unit controls the flow of the fluid from the fluid source to provide the mobile unit with pressurized fluid when the mobile unit is cleaning the interior space of the building.