CREATE TABLE table_60610 ("Official Name" TEXT, "Status" TEXT, "Area km 2" FLOAT, "Population" FLOAT, "Census Ranking" TEXT)

Which Area km 2 has an Official Name of southampton, and a Population larger than 1,601?
SELECT MIN("Area km 2") FROM table_60610 WHERE "Official Name" = 'southampton' AND "Population" > '1,601'
SELECT MIN("Area km 2") FROM "table_60610" WHERE "Official Name" = 'southampton' AND "Population" > '1,601'