Provinces

Argentina is divided into twenty-three provinces (provincias; singular provincia), and one autonomous city (commonly known as the capital federal, but officially Ciudad Autónoma de Buenos Aires).
Though declared the capital in 1853, Buenos Aires didn't become the capital of the country until 1880. There have been moves to relocate the administrative centre elsewhere. During the presidency of Raúl Alfonsín, a law was passed ordering the transfer of the federal capital to Viedma, a city in the Patagonian province of Río Negro. Studies were underway when economic problems halted the project in 1989. Though the law was never formally repealed, it is now treated as a relic.
Provinces are divided into smaller secondary units called departamentos ("departments"), of which there are 376 in total. The province of Buenos Aires has 134 similar divisions known as partidos. Departamentos and partidos are further subdivided into municipalities or districts.
In descending order by number of inhabitants, the major cities in Argentina are Buenos Aires, Córdoba, Rosario, Mendoza, Tucumán, La Plata, Mar del Plata, Salta, Santa Fe, San Juan, Resistencia, and Neuquén.