Martínez is a city in San Isidro Partido, Buenos Aires Province. It is part of Greater Buenos Aires. It is served by a commuter train service, the Tren de la Costa tourist railway line, and many buses.
Some areas of Martínez, especially near Avenida del Libertador, are relatively affluent. That area is considered rather safe. Unicenter is a major shopping centre. Some of the better-known cafés are Café Victoria and Café Martinez. A favoured street for shopping is Calle Alvear.
A UBA building is located in Martínez.
The Martinez local government has recently set up a recycling program.
Martínez should not be confused with Villa Martínez de Hoz.
UN/LOCODE is ARMAR.