The 108 kilometer (67 mile) boundary between Eswatini and Mozambique runs generally north to south, entirely following straight lines. Its delimitation relies on both colonial agreements and demarcation efforts. The government of Eswatini has referenced the idea that it has rights to claim parts of Mozambique based on the historic territorial extent of the Kingdom of Eswatini. No movement toward formalizing additional boundary claims has been made, and the frontier is not considered disputed.

Despite the possible boundary issues, the two nations have relatively good relations. Both countries are members of the Commonwealth of Nations, even though Mozambique was never a British colony.