586,505 4,714.8 124.4 Cotabato City 1 — 163,849 175.99 931.0 General Santos City 2 — 411,822 492.86 835.6 ^1   Cotabato City  is independent of  Maguindanao  province, which is part of the  Autonomous Region in Muslim Mindanao . The seat of the  ARMM regional government is also in  Cotabato City .