General San Martín Partido is a partido in the Gran Buenos Aires urban area, immediately to the north-west of the Capital federal in Buenos Aires Province, Argentina.

The provincial subdivision has a population of 422,830 inhabitants[1] in an area of 56 km2 (22 sq mi), and its capital city is also named San Martín.

The partido (district) and its capital are named in honor of General José de San Martín, who led Argentina against the Spanish Empire in the Argentine War of Independence.

In rugby union San Martín partido is home to CEC Liceo Militar.

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