For Municipal Ordinance Nº 26.607 of the year 1972, the City of Buenos Aires was divided in the following neighborhoods:

Agronomía, Almagro, Balvanera, Barracas, Belgrano, Boca, Boedo, Caballito, Coghlan, Constitución, Colegiales, Chacarita, Flores , Floresta , Liniers , Mataderos , Monte Castro , Montserrat , Nueva Pompeya, Nuñez, Palermo , Parque Avellaneda , Parque Chacabuco , Parque Patricios , Paternal , Puerto Madero , Recoleta , Retiro , Saavedra , San Cristóbal , San Nicolás , San Telmo , Velez Sársfield , Versalles , Villa Crespo , Villa del Parque , Villa Devoto , Villa General Mitre , Villa Lugano , Villa Luro , Villa Ortúzar , Villa Pueyrredón , Villa Real , Villa Riachuelo , Villa Santa Rita , Villa Soldati , Villa Urquiza. 

In the decade of the the 90 this regulation modified to include the neighborhood of Puerto Madero (the old port of Buenos Aires that was recycled)

The neighborhoods present individually, characteristic different, product of their location, their architectural lines, their streets and the activities that are developed in them. 
This way for example:

Boca is a typical neighborhood, very peculiar, where the irregularity of its streets and the varied colors of the front of their houses give the original note of the same one, painters' of fame home, as Benito Quinquela Martin. 

San Nicolás is the neighborhood where the bank and market activity is joined with the commercial one, having important and luxurious galleries and diverse business, I eat modern buildings likewise. Downtown is also, the location place among other, of Government's House, the Metropolitan Cathedral, the Command in Boss of the Army, the Bank of the Nation Argentina, the Ministry of Treasury, and headquarters of most of the theaters and cinematographs that are distributed in everything Buenos Aires. 

San Telmo: at the moment in restoration process it is the faithful testimony of a past full with charm, with their old large houses and you narrow sidewalks. In the corner of Brazil and Defense, February of 1536, 3 Pedro of Mendoza planted the "Tree of the Justice" and in the current square Dorrego, was the terminal of the carts in the colonial time. In this neighborhood  is the Minimum House that is the most narrow in the city with 2,20 m of wide, located in the Passage San Lorenzo 380; and it is the center of one of the main tourist circuits of the city. 

Monserrat: integral of the old and distinguished South neighborhood, together with San Telmo, it also possesses several landmarks of consideration, as the church Saint John the Baptist, built in 1620, to which was annexed in 1768 the Convent of Our Mrs. of the Pilar from Zaragoza, reggio of the congregation of the clarisas. Another bastion is the church of Ntra. Mrs. of Montserrat, historical monument where the replica of the original image is conserved, hidden in Barcelona in the century VIII to protect it of the Muslims. 

Barracas: are par excellence the industrial area of the city

Recoleta: is the elegant neighborhood, with luxurious palaces and where the famous necropolis also rises for its historical monuments. 
The City of Buenos Aires, to be the Federal District, is the headquarters of the national authorities and it is, also, a highly qualified education center that one manifests in the universities, the scientific academies, the museums, the libraries and the different teaching establishments that are in her. 

In the last years, the development of the city has determined the construction of an important quantity of hotels of great category that receive a considerable number of passengers (managers, tourists, political and artistic figures, etc.) along the whole year.