The Poetto district takes its name from the famous seaside resort which stretches for about four kilometers, from the Sella del Diavolo (Devil’s Saddle) to the beginning of the coast of Quartu Sant'Elena. The area between the beach and the Molentargius saltworks is inhabited by numerous residents but it is it is invaded by tourists especially during the summer months. The main economic activity of the neighbourhood was linked to the extraction of salt; the extraction plants remained active until the eighties of the twentieth century. According to different interpretations, the origin of the name Poetto would depend on a Spanish tower, called “of the poet” or it would derive from the presence of ancient wells and cisterns extant on the Sella del Diavolo for the collection of water.

The Mulinu Becciu district extends in the north western part of Cagliari, after Sant'Avendrace and San Michele. It underwent a significant development starting from the eighties, hosting partly public housing buildings and partly residential buildings. It stands on a slightly hilly area, that in the past was used for the cultivation of vines and mills were also built for the millstone that give the neighbourhood its name.

The Monte Urpinu district takes its name from the homonymous hill. Shortly located from the center, it is characterized by the presence of a large green area and the panoramic road called Europa Avenue. It was built starting in the 1950s as the new residential district of the city and experienced its maximum expansion in the 1970s. It houses the Binaghi hospital.

The small Monte Mixi district is located between Viale Diaz and the sports facilities of Rockefeller Street. It was built on a hill of modest size, called Monte Mixi. It borders the districts of Bonaria, Monte Urpinu, La Palma and Sant'Elia.

The Marina district is one of the four historic districts of Cagliari. Its boundaries are delimited to the north by the walls of Castello, to the south from Roma street, to the east from Regina Margherita Avenue and to the west from Largo Carlo Felice.

Its origins date back to the times of the Pisan domination; it arose as an area intended to house the warehouses and the dwellings of the workers of the port. 

The initial name was Lapola and the neighbourhood was equipped with a defensive system of walls and bastions, modernized by the Spaniards and demolished in the second half of the nineteenth century.

La Vega is a residential district of Cagliari. Located in the northern area of the city, it was built around 1930 and in the upper part houses the public gardens and the walls of the Castle. The name "la vega" has Spanish origins and indicates the garden because in the past there was a vast countryside here. Today it is mainly frequented by students and there is the Student House and the church of Saint Francesco d'Assisi, built in the second half of the twentieth century.

La Palma is a district of Cagliari that extends between the former salt flats of Molentargius and the Poetto beach. It is connected to the district of the Sun through via Favonio. It is a residential area, characterized by the presence of green spaces and public areas.

The area corresponding to the Is Mirrionis district was already frequented since the Copper Age as evidenced by the materials found and ascribable to the culture of Monte Claro, dating back to the second half of the third millennium BC. Until the nineteenth century it was a rural area but after the Second World War, starting from the sixties, it began to be more populous. Today it is a very important district for the city of Cagliari because of the presence of numerous public structures: the faculty of Letters and Engineering, the hospital and the park of Monte Claro.

Located at the foot of Monte Urpinu, the Genneruxi district arose in the early seventies. The derivation of the name has two historical hypotheses: in an ancient story it is said that there was a small wrought iron door with a cross (Genna 'e cruxi / Janua Crucis), the only remnant of an ancient cemetery or church, in the another seems that the name derives from the custom of the Benedictine monks to delimit the boundaries of the lands towards the Campidano with crosses. In any case, over the years the name has changed to the more fluid Genneruxi.

It is a high-rise residential district composed mostly of stately buildings, large villas and small villas, the largest villas with a large attached garden, are located mainly in the area adjacent to the Molentargius pond located between Marconi Avenue and the median axis.

Genneruxi is characterized by large green areas, wide tree-lined avenues and squares present especially along Stockholm street.

The parish in the area is the Santissimo Crocifisso, to which a very popular oratory is annexed.

Inside the neighbourhood there are several schools, a Cagliari light rail stop and various stops of the CTM bus nº 6.

An integral part of the Genneruxi district is the Saint Giuliano area:

Saint Giuliano (in Sardinian: Santu Lianu) is located under the eastern slopes of the hill of Monte Urpinu (on whose northern slopes stood the Benedictine monastery of Saint Giuliano and of which no trace remains) and ends on the banks of the canal that delimits the pond of Molentargius on this side.

Fonsarda is a residential and commercial district of Cagliari, built in the second half of the twentieth century.

Until the twentieth century on the site of the neighbourhood there were agricultural fields, orchards and country villas.

In the 1940s, at the end of the Second World War, the municipal administration decided to build a group of public housing units at the end of Dante Street (which in the municipal projects of 1926 should have continued until Pirri), to solve - at least partially - the situation of those who had lost their homes during the bombing. In front of this first group of houses a large square was installed, later dedicated to Pope John XXIII, inside which, in 1956, the parish church of Saint Paul was built.

Subsequently, schools were built on one side of the square. In the 70s a second urbanization of the district began, mostly on the initiative of some entrepreneurs, which led to the construction of taller buildings than the previous ones. In this period, a neighbourhood committee was also set up to safeguard spaces not yet affected by buildings; the committee's actions include the mobilization against the construction of the headquarters of the Asst (State Telephone Service Company), which was supposed to house numerous antennas, in the space where the T-Hotel now stands, and the cementing of the area where there is now the Park of the Music, which until the seventies housed an olive grove. Today the district is characterized by palaces and, in part, by villas with gardens.

In the neighbourhoods there is an elementary school, the middle school "Gaetano Cima" and the scientific high school "Michelangelo".

At the borders there is the Opera House, connected to the hub of the district by the modern Park of Music.

On the edge of the La Vega district, however, there is the headquarters of the province of Cagliari.