Artemisa is a municipality and city in Cuba, formerly part of La Habana Province. According to a law approved by the Cuban National Assem…Artemisa is a municipality and city in Cuba, formerly part of La Habana Province. According to a law approved by the Cuban National Assembly in August 2010, Artemisa became the capital city of the newly formed Artemisa Province, which comprises eight municipalities of the former La Habana Province and three from Pinar del Río. It has an area of 642.0 square kilometers and a population of over 86,444 inhabitants.