Caballito (pronounced [kaβaˈʝito]; Spanish for "little horse") is a barrio (neighborhood) of the Argentine capital, Buenos Aires.

The name is said to come from the horse-shaped (Spanish caballo) weather vane from a local pulpería (gauchos' bar); Caballito meaning "Little horse".

Designed by renowned French-Argentine urbanist Charles Thays, the approximately 50-acre (200,000 m2) park is one of Buenos Aires' largest as well as home to a concentration of public facilities; along the mile-long perimeter (a common jogging route), the park is home to Bernardino Rivadavia Natural Sciences Museum (Buenos Aires' most important), Marie Curie Hospital, the Leloir Research Institute and the local observatory.

The neighbourhood has a long historical connection with the Underground, since it is the site of the Polvorín Workshop, where the line's La Brugeoise rolling stock was repaired.

[3] Similarly, there is the Sarmiento Line, a commuter rail service which takes passengers westward to Greater Buenos Aires or eastward to Once railway station and closer to the city centre.