World T20 schedule
All-rounder Jacques Kallis figures in the list and so is Test captain Graeme Smith. World T20 starts in Sri Lanka on September 18.
The final squad of 15 players will be announced in mid-August. AB de Villiers will be the captain of the team.
"I believe this squad shows just how much depth there is in South African cricket," said CSA selection convener Andrew Hudson.
"It augurs extremely well both for this tournament as well as the road ahead."
South Africa's 30-man squad: AB de Villiers (captain), Hashim Amla, Farhaan Behardien, Johan Botha, Marchant de Lange, JP Duminy, Faf du Plessis, Reeza Hendricks, Imran Tahir, Colin Ingram, Jacques Kallis, Rory Kleinveldt, Richard Levi, Ryan McLaren, David Miller, Albie Morkel, Morne Morkel, Chris Morris, Justin Ontong, Wayne Parnell, Alviro Petersen, Robin Peterson, Aaron Phangiso, Graeme Smith, Dale Steyn, Rusty Theron, Lonwabo Tsotsobe, Roelof van der Merwe, Morne van Wyk, Dane Vilas.