|Total Land Area||: 570.2378 Hectares|
|Timber Land||: 152.5922 Hectares|
|A&D Land||: 417.6456 Hectares|
|Distance from Town Proper||: 4.0 km|
|Total Population (as of 2012)||: 1,433|
|Total Number of Households||: 295|
|Topography||: Generally plain|
|Soil Type||: Ubay Sandy Loam|
|Climate||: Evenly distributed rainfall|
|Typhoon Occurrence||: Seldom|
|Geographic Location||: Located b\n 124˚22’00”-124˚24’10” E 10˚04’00” to 10˚06’00” N|
|Barangay Anniversary||: Every January 5|
|Year Established||: January 05, 1968|
|Barangay Fiesta||: Every May 5/6 & Aug. 28|
|Patron Saint of the Barangay||: St. Augustine|
|North||: Tagum Norte and portion of Soom River, Trinidad, Bohol|
|South||: Soom and La Union, Trinidad Bohol|
|East||: Soom River & Portion of Soom Mainland, Trinidad, Bohol|
|West||: Tagum Norte and portion of Guinobatan, Trinidad,Bohol|
Barangay Tagum Sur originated its name from tagum, a kind of herbal plants which abound in the area . Because of its abundance, most of the quack doctors used to drop by to get supply of this famous herbs that is the main reason why most of the people named and called the place Barangay Tagum .
Before it is called by its present official name , the ancient folks living on that time called the place Sitio Calunasan . During the flagship of Mayor Vicente Boncales, barangay Tagum was divided into two barrios namely Tagum Sur in the southern part and Tagum Norte in the north so that the delivery government services may easily achieved and acknowledged by the barangay constituents. During that time Mayor Vicente Boncales chose an energetic leader for the preparation of a Consultation Plan. The leader on that time named PABLO J. OTARA. Pablo Otara or fondly called “Pabling” by most of his friends who was a recognized leader on that time, called a Consultative Meeting so that Sitio Calunasan become a barangay. The members who were present during the consultation were the following:
- Mun. Kagawad Eduardo Sayson Cajes –Incumbent councilor 1964
- Mamerto Cajes 18. Pastor Cajes
- Toribio Cajes 19. Jesus Bayonas, Sr.
- Jose Gonzales 20. Eutiquio Odiongan
- Anaclito Gonzales 21. Prudencio Somusa
- Regino Tabar 22. Teofino Bulabos
- Eugenio Quiroy 23. Bonifacio Bayonas Sr.
- Maximino Otara 24. Andres Bayonas
- Conrado Avenido 25. Efepania Cajes
- Celestino Somusa 26. Rosendo Turan
- Dionisio Cutor 27. Doroterio Sayson
- Policarpo Gonzales 28. Placido Añora
- Segundino Cornesio 29. Efepanio Otara
- Hugo Gonzales 30. Roque Cutaran Sr.
- Felipe Odiongan 31. Teofilo Amaba
- Vitaliano Tubo
- Evaristo Bual
During the Consultative Meeting the members present agreed, to file an “Application Paper”, a Position Paper with the signatures of all Constituents unanimously endorsing Sitio Calunasan into a real Barangay. The said “Application Paper/Position Paper” was submitted to the Municipal Council thru the sponsorship of Municipal Incumbent Kagawads Eduardo Cajes and Arcadio Orevillo. The application was approved in 1964 during the regime of the late Governor Lino I. Chatto and Vice-Gov. David Tirol under the sponsorship of Board Member Erico Aumentado. On January 5, 1968 Barangay Tagum Sur became an official barangay.