Mar Chiquita is a lagoon in the southeast province of Buenos Aires in eastern Argentina. It is located by the Atlantic coast, 30 km north of Mar del Plata.
The area is a natural reserve where a number of species of animals live around the lagoon.
The location was also used as a suborbital launch site at coordinates 37°45' South, 57°25' West between 1968 and 1972; eight sounding rockets of the types Arcas, two rockets of the type Orion-1, and a rocket of the type Dragon, were launched from there. On the southern side of the lagoon there is a small resort village.