Southernmost

['sʌðənməʊst] or ['sʌðɚnmost]

(adj.) situated farthest south; 'Key West is the southernmost city in the continental United States' .

Checked by Beth--From WordNet

(a.) Farthest south.

Typed by Borg

Smith's divisions by the southernmost of these roads, and Osterhaus and Carr by the middle road. Ulysses S. Grant. Personal Memoirs of U. S. Grant.
We had now reached the southernmost extremity of the great ice barrier. Edgar Rice Burroughs. The Gods of Mars.

Typed by Borg