partido (county) at the southern limits of Gran (Greater) Buenos Aires, eastern Argentina, in Buenos Aires provincia (province). Created in 1913 from portions of the counties of Lomas de Zamora and San Vicente, Esteban Echeverría is an agricultural (and, more recently, low-income suburban) zone, characterized by green villas that support dairy farms and orchards of fruit trees. Ezeiza, the major international airport of Buenos Aires, is located there. Pop. (2001) 243,186.