Aracaju (Portuguese pronunciation: [aɾakaˈʒu]) is the capital of the State of Sergipe, Brazil, located in the northeastern part of the country, about 350 km (217 mi) north of Salvador. It has a population of 570,937 inhabitants, which represents approximately 33% of the state population. The coast of Aracaju has many unspoiled beaches, such as the ones in Santa Luzia Island, and urban beaches, such as the Atalaia. These coastal neighborhoods include playgrounds, squares, football fields, volleyball and basketball courts, residential buildings, bars, nightclubs, restaurants, banks and hotels.

Aracaju, one of the first cities to be planned in Brazil, was built with the intention of becoming the state capital. It was founded in 1855, as the capital of Sergipe.

Although the first contact of the Portuguese in Sergipe was here, the first and most important city of that place which would be a province in the future was São Cristóvão (Saint Christopher), which became a city in 1590 and was capital of Sergipe from 1823 to 1855. In the mid-19th century, there was a sudden need for a purpose-built harbor and administrative centers, and the core of modern Aracaju was constructed overnight, becoming the province capital in 1855, and after 1889 the state capital. In 1910, the city was made the seat of the Roman Catholic Archdiocese of Aracaju.