Mar de Ajó, Argentina

Mar de Ajó is a coastal city in Buenos Aires Province, Argentina, and is located in the southern end of the seaside La Costa Partido (the Coast District).

Named for the original Partido de Ajó district established by Governor Juan Manuel de Rosas in 1839, the fishing village became of interest to tourism during the 1920s, when district Mayor Jorge Gibson graded the area's beaches. The town was officially established on December 21, 1935, and in 1936, its pier was completed; measuring 270 m (886 ft), the Mar de Ajó Pier is the largest of the five in the La Costa District. Mar de Ajó grew to become the most populous of the thirteen La Costa District municipalities, and rivals San Clemente del Tuyú, the northernmost La Costa town, in tourist activity.