Alsina is a surname. Notable people with the surname include:
Adolfo Alsina (1829–1877), Argentine lawyer and Unitarian politician August Alsina (born 1992), American singer Josep Alsina (born 1954), Catalan academic and activist Juan Perez Alsina, Argentine politician for the Salta Renewal Party Landelino Lavilla Alsina (1934–2020), Spanish politician Manuel F. Alsina Capo (1909–2008), prominent Spanish-American urologist surgeon Oriol Alsina (born 1967), Spanish football manager Pau Alsina (2008–2025), Spanish motorcycle racer Ramón Martí Alsina (1826–1894), Spanish Eclectic painter Valentín Alsina (1802–1869), Argentine lawyer and politician
See also Estación Puente Alsina, Argentine railway station in the Greater Buenos Aires neighbourhood of Valentín Alsina Puente Alsina (film), 1935 Argentine musical film directed and written by José A. Ferreyra Puente Valentín Alsina, neo colonial bridge over the Riachuelo inaugurated in 1938 Adolfo Alsina Partido, western partido of the Buenos Aires Province, Argentina Valentín Alsina, Buenos Aires, city in the Lanús Partido of Buenos Aires Province, Argentina Zanja de Alsina, system of trenches and fortifications built in the centre and south of the Buenos Aires Province