SELECT "districts" FROM table_204_739 ORDER BY "population" DESC LIMIT 1
which district in this city has the greatest population ?
CREATE TABLE table_204_739 (
    id number,
    "districts" text,
    "ubigeo" number,
    "area\n(km2)" number,
    "population" number,
    "population density\n(/km2)" number,
    "created" text,
    "postal\ncode" number
)