Rivonia is a suburb of Johannesburg, South Africa in the Sandton area. It is located in Region E of the City of Johannesburg Metropolitan Municipality. Rivonia is one of the most affluent residential and business suburbs of Johannesburg, and regarded as the hub of upstart and established I.T. companies. The main retail thoroughfare in the area, Rivonia Boulevard, is the location of several shopping complexes as well as many other shops and restaurants. The area known as Rivonia includes the original township of Edenburg, Edenburg Extension 1, and 19 smaller extensions designated 'Rivonia Extension ...', numbered from 0 to 25. There is no designated township called Rivonia. The post code for Rivonia is 2128.