[2][3] According to data provided by the XII General Census of 2000 documenting Population and Housing carried out by the National Institute of Geographic Statistics and Informatics (INEGI), there are three main ethnic groups in the municipality: whites, indigenous Mexicans and blacks, which by intermarriage have formed the current phenotypical characteristics of some of the Cuajinicuilapa population.

[4] As seat, the town of Cuajinicuilapa is the local government for ninety communities, which together cover an area of 715km2.

[5][9] Punta Maldonado is a small cape, which is the furthest point east of the state of Guerrero.

[8] Cuajinicuilapa is located on what was once the Ayacastla province, stretching from the river Ayutla all the way to the plains that share borders with the states of Guerrero and Oaxaca, and was integrated with people of different ethnic and language groups such as: Ayutla Xochitonala, Acatlan Cuauhtepec, Tututepec, and the Tlacuilo had the language of the Mixtec.

Igualapa and Ometepec spoke ayacasteca, but also understood amusga speaking individuals.

In 1824, when Mexico first became a Federal Republic, Cuajinicuilapa belonged to the party of Ayutla and to the District of Tlapa in the State of Puebla.

By creating the state of Guerrero in 1850 Cuajiniculapa was integrated to the municipality of Ometepec and the District of Allende in 1852 and was constituted as a town with the southern part of Ometepec and was integrated to San Nicolás Maldonado which is the municipal head of Cuajinicuilapa which since 1862 belongs to Abasolo district.