Barangay sta. Rita is the largest of all the 17 barangays of the city. It is bounded to the north by sta. Rita river, to the east by east bajac-bajac, to the west by barangay mabayuan and barangay gordon heights and to the south by barangay old cabalan.
Barangay sta. Rita is generally a flat valley bounded by mountain ranges and the sta. Rita river that serves as the catch basin of water during rainy season. Its land elevation is below sea level and considered the flood plain of the city of olongapo. Flooding that occurred can be attributed to the overflowing of the mabayuan and sta. Rita river where strong water emanated from the mountains surrounding it.
The shallowing of the river brought about by the eruption of mount pinatubo in 1992 is also one factor in the frequent flooding of the area. Dredging is given priority top priority with the simoultaneous operation of two dredging machne.
In spite of all the aforesaid difficulties, barangay sta. Rita is considered the most active barangay in terms of development. It surpasses other barangays in terms of number of puroks, number of population and the vastness of land area. Horticulture and residential lands exist.
