Grebo people (or Glebo) is a term used to refer to an ethnic group or subgroup within the larger Kru group of West Africa, a language and cultural ethnicity, and to certain of its constituent elements. Within Liberia members of this group are found primarily in Maryland County and Grand Kru County in the southeastern portion of the country, but also in River Gee County and Sinoe County. The Grebo population in Côte d'Ivoire are known as the Krumen and are found in the southwestern corner of that country.
A 2001 estimate of the number of Grebo people in Liberia is approximately 387,000. There are an estimated 48,300 Grebo in Côte d'Ivoire, not counting refugees. Precise numbers are lacking, since many have been displaced by the civil war in Liberia of the late 20th and early 21st century.
As early European explorers and Americo-Liberian colonists reached the area of Cape Palmas by sea, the first indigenous group they encountered in the area with whom they established prolonged relations were the Seaside Grebo, or Glebo. The colonists referred to them generally as the Grebo. In the absence of other qualification, the term Grebo has come to refer generally to this group in particular, which has occupied southwest coastal areas of what is now Liberia.
Considerable ambiguity and imprecision accompany the use of the term Grebo; as it is not always clear precisely which group writers or speakers intend to denote. Some of this ambiguity has evolved historically, as the name was generalized from that of the first group contacted by Americo-Liberian colonists in the area that was settled as Maryland County. As colonists used the term to refer to other, lesser-known groups in inland areas, the term became more imprecise, as such groups often belonged to other language families and ethnicities. This confusion has been perpetuated, as Grebo has been used as a cover-label for groups in the area now known by scholars known to be different, but which are often classified as the same for convenience.