Saint Kitts has a population of about 40,000, the majority of whom are of African descent. The primary language is English, with a literacy rate of approximately 98%. Residents call themselves Kittitians.

A person from the island of St. Kitts is officially called a Kittitian (pronounced ki-TISH-un). Because St. Kitts is part of the twin-island federation of Saint Kitts and Nevis, the collective demonym for a citizen of the entire country is a Saint Kitts and Nevisian. However, residents of the individual islands take great pride in their specific identities; someone from Nevis is called a Nevisian. The term "Kittitian" is derived from "Kit," the common nickname for Christopher, referring back to the island's formal name, Saint Christopher. In local culture, you might also hear the term "Mother Colony" used in a historical context, as St. Kitts was the first British colony in the Caribbean. When traveling there in 2026, using the specific term Kittitian is the most accurate and respectful way to refer to the local population.