Say Zamboanga del Sur et unaan ya klase a luyag ed rehiyon na Zamboanga Peninsula, Filipinas. Unong ed 1 Mayo 2020 census, say populasyon to et 1,050,668 totoo tan 239,258 abong. Walay kabaleg tan sukat to ya 4,499.46 sq. km. Say kodigo telefono +63 (0)62. Say kapital to et Pagadian.
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Census of Population (2015). "Region IX (Zamboanga Peninsula)". Total Population by Province, City, Municipality and Barangay. PSA. Retrieved 29 June 2016.
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Census of Population and Housing (2010). "Region IX (Zamboanga Peninsula)". Total Population by Province, City, Municipality and Barangay. NSO. Retrieved 29 June 2016.