Map - Ciénaga, Magdalena (Ciénaga)

Ciénaga is a municipality and a town in the Magdalena Department, Colombia, the second largest population center in this department, after the city of Santa Marta. It is situated at 11° 00' North, 74° 15' West, between the Sierra Nevada de Santa Marta, the Caribbean Sea and the Ciénaga Grande de Santa Marta marsh in northern Colombia. The town is situated in the northern part of Magdalena, 35 km from Santa Marta. According to estimations, in 2019, there were 105,510 inhabitants. The mean annual temperature is 34 °C.

Prior to the arrival of the Spanish colonizers the area was vastly populated by Chimila indigenous people and a village known as Pongueyca. The foundation of Ciénaga has always been a matter of dispute due to many different historical theories and the lack of documented sources. It is believed to be founded first in what is now a small village known as Pueblo Viejo and the site of a former Chimila tribe. In 1529 monk Fray Tomás Ortiz established a parish that would later burn in a fire. It was then refounded as a city by Fernando de Mier y Guerra under the name of Villa de San Juan Bautista de la Ciénaga but also was known with the names of San Juan del Córdoba, Aldea Grande, Córdoba, Pueblo de la Ciénaga and simply Ciénaga.

During the war of independence from Spain, Ciénaga became a battle ground on November 10, 1820, between loyalists and independentists of what became known as the Battle of Ciénaga.

On December 6, 1928, the Banana massacre (in Spanish, matanza de las bananeras) occurred in this town. It was a massacre of workers for the United Fruit Company; an unknown number of workers died after the government decided to send the military forces to end a month-long strike organized by the workers' union in order to demand better working conditions. 100 - 2,000 people were massacred in the strike.

In 2012, the Colombian government named Ciénaga a Pueblo Patrimonio (heritage town) of Colombia, making it the first town in Magdalena department to earn the distinction. As of March 2021, Ciénaga is Colombia's northernmost Pueblo Patrimonio.