The Haiti–Dominican Republic Border on Hispaniola

The island of Hispaniola is divided between two sovereign nations: Haiti (western third) and the Dominican Republic (eastern two-thirds). They share a single land border stretching 391 kilometers (243 miles) from the Caribbean Sea in the south to the Atlantic Ocean in the north.

Border Geography

The boundary follows a mix of natural features and surveyed lines:

• Southern section: Runs along the Massacre River (Rivière Massacre / Dajabón River) from its mouth at Manzanillo Bay inland.
• Central highlands: Cuts through the Cordillera Central mountain range, following watershed divides.
• Northern section: Traverses lower terrain to the Atlantic coast near Ouanaminthe (Haiti) and Dajabón (DR).

Historical Context

The border was formalized by the 1929 Treaty of Peace and Friendship (revised 1935), following decades of dispute after both nations gained independence—Haiti in 1804, the Dominican Republic in 1844. The Massacre River takes its name from the 1937 Parsley Massacre, when Dominican dictator Trujillo ordered the killing of thousands of Haitians near the border.

Today, the border is a zone of intense commerce, migration, and tension. Four official crossings facilitate legal trade and movement, while informal crossings are common. The contrast in development—Dominican GDP per capita is roughly 6–7 times Haiti's—drives complex economic and humanitarian dynamics.