Chiapas is a state in Southwest Mexico. According to the 2020 Mexican census, it has the eighth largest population of all states with 5,543,828 inhabitants and the 10th largest by land area spanning 73,560.47 square kilometres (28,401.86 sq mi). Chiapas is officially divided into 124 municipalities, although the establishment of municipal authorities in Belisario Domínguez was suspended in 2015 pending the resolution of a territorial dispute between Chiapas and the neighbouring state of Oaxaca. In 2021, the Mexican Supreme Court resolved this dispute in Oaxaca's favour, and annulled the 2011 decree that had created Belisario Domínguez.

Chiapas, officially the Free and Sovereign State of Chiapas, is one of the states that make up the 32 federal entities of Mexico. It comprises 124 municipalities as of September 2017 and its capital and largest city is Tuxtla Gutiérrez. Other important population centers in Chiapas include Ocosingo, Tapachula, San Cristóbal de las Casas, Comitán, and Arriaga. Chiapas is the southernmost state in Mexico, and it borders the states of Oaxaca to the west, Veracruz to the northwest, and Tabasco to the north, and the Petén, Quiché, Huehuetenango, and San Marcos departments of Guatemala to the east and southeast. Chiapas has a significant coastline on the Pacific Ocean to the southwest.