Fray Bartolomé de las Casas is a municipality in the Guatemalan department of Alta Verapaz. It is situated at 170m above sea level. It contains 31,611 people. It covers a terrain of 1229km2. The annual festival is April 30-May 4. It is named after the 15th-century Spanish priest, bishop, and writer Bartolomé de Las Casas.

Bartolomé de las Casas (c. 1484 – 18 July 1566) was a 16th-century Spanish historian, social reformer and Dominican friar. He became the first resident Bishop of Chiapas, and the first officially appointed "Protector of the Indians". His extensive writings, the most famous being A Short Account of the Destruction of the Indies and Historia de Las Indias, chronicle the first decades of colonization of the West Indies and focus particularly on the atrocities committed by the colonizers against the indigenous peoples.