[2] Riachuelo borders the municipalities of Laranjeiras, Divina Pastora, Santa Rosa de Lima, and Areia Branca, all within the state of Sergipe.

[4] By the 1590s, the region that today encompasses municipality of Riachuelo was occupied by the family of the Portuguese Mesquita Pinto, where it was constructed his sugar cane mill, also known in Brazil as engenho.

[5] On the period of 1602 and 1603, occurred the colonization of the valleys of the Cotinguiba and Sergipe Rivers jointly to the industrialization of the sugar cane.

In 1872, the parish was elevated to the status of town, maintaining the name and old territorial limits, being a dismemberment of the municipality of Laranjeiras.

[5] About the origin of the city, there is a consensus among the oldest inhabitants that it sprouted from the Sítio do Meio settlement, and from there grew into the urban space it is today.

It is rich in marine micro and macro fauna, with a particular abundance of ammonites, but also with fossils of gastropods, bivalves, brachiopods, serpulids, equinoderms, ostracoids, radiolarians, lobsters and Crabs.

[5] In the modern day, many of these plantations have been deactivated or transitioned into other businesses models, such as fish farming and animal husbandry.