Valentín Alsina is a city in the Lanús Partido of Buenos Aires Province, Argentina. It is located next to Buenos Aires city in the Gran Buenos Aires urban area.

The city was named after Valentín Alsina (1802–1869), two-time Governor of the independent State of Buenos Aires. It is considered one of the historical 'cien barrios porteños,' one of the 100 'barrios' of the city.

• Jorge Carrascosa (born 1948), former footballer
• Gustavo Adrián López (b. 1973), footballer
• Mabel Manzotti (1938–2012), film, stage, and television actress
• Ricardo Montaner (born 1957), singer and songwriter
• Edmundo Rivero (1911-1986), tango singer and composer
• Sandro (1945–2010), singer and actor

• Nápoles, Italy
• Nouméa, New Caledonia
• Caracas, Venezuela
• Vilnius, Lithuania
• Polla, Italy

• Media related to Valentín Alsina, Buenos Aires at Wikimedia Commons
• Alsina Online - News and City Stories (in Spanish)