 It is also the only district in Manila that is found north and south of the Pasig River.Santa Ana belongs to the 6th congressional district of Manila with thirty-two barangays from Zone 96 to 100, barangays 874 to 905.Based on the 2000 national census, the National Statistics Office reports that Santa Ana has about 34,694 households, and an approximate 83,306 registered voters based on the national elections of 2004.