Race was dropped from the census after 1960.
Including Arabs as well.
A covenant was signed between two commissions from both countries on July 26, 1867, but it did not enter into force because it was not approved by the Senate of Haiti.

Sources for area, capital, coat of arms, coordinates, flag, language, motto and names:
For an alternate area figure of 48,730 km², calling code 809 and Internet TLD:

Coordinates: 19°00′N 70°40′W / 19.000°N 70.667°W / 19.000; -70.667

The Dominican Republic (Spanish: República Dominicana [reˈpuβlika ðominiˈkana]) is a sovereign state occupying the eastern two-thirds of the island of Hispaniola, in the Greater Antilles archipelago in the Caribbean region. The western one-third of the island is occupied by the nation of Haiti, making Hispaniola one of two Caribbean islands, along with Saint Martin, that are shared by two countries. The Dominican Republic is the second-largest Caribbean nation by area (after Cuba) at 48,445 square kilometers (18,705 sq mi), and 3rd by population with approximately 10 million people, of which approximately three million live in the metropolitan area of Santo Domingo, the capital city.

Christopher Columbus landed on the Western part of Hispaniola, in what is now Haiti, on December 6, 1492. The island became the first seat of the Spanish colonial rule in the New World. The Dominican people declared independence in November 1821 but were forcefully annexed by their more powerful neighbor Haiti in February 1822. After the 1844 victory in the Dominican War of Independence against Haitian rule the country fell again under Spanish colonial rule until the Dominican War of Restoration of 1865.

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Wikipedia