Final answer:
The southernmost landlocked country in the world is Lesotho. It is a small constitutional monarchy located in Southern Africa and completely surrounded by South Africa.
Step-by-step explanation:
The southernmost landlocked country in the world is Lesotho. Lesotho is a small constitutional monarchy located in Southern Africa. It is completely surrounded by South Africa and has a mountainous terrain with most of the land area being more than one mile in elevation. The capital city of Lesotho is Maseru.