Donoso District is a district of Colón Province in Panama. The population according to the 2000 census was 9,671; the latest official estimate i…Donoso District is a district of Colón Province in Panama. The population according to the 2000 census was 9,671; the latest official estimate is 14,798. The district lies along the Caribbean coast in the west of the province and covers a total area of 1,826 km². The capital is the town of Miguel de la Borda.