Auto Motor und Sport have published images of all where the 2013 DRS zones will be for all 19 circuits. You can study them yourself in this picture gallery. A quick summary: all tracks except Monaco and Suzuka will have two DRS zones.
Australia: Two DRS zones, same as last year.
Malaysia: DRS zone added between turns 14 and 15.
China: DRS zone added on the start-finish straight.
Bahrain: DRS zone added between turns 10 and 11.
Spain: DRS zone added between turns 9 and 10.
Monaco: One DRS zone, same as last year.
Canada: DRS zone added on the start-finish straight, same as 2011.
Silverstone: DRS zone added between Chapel and Stowe.
Nürburgring: DRS zone added (with respect to 2011) on the start-finish straight.
Hungary: DRS zone added between turns 1 and 2.
Spa: DRS zone added on the start-finish straight.
Monza: Two DRS zones, same as last year.
Singapore: DRS zone added on the start-finish straight.
Korea: DRS zone added on the start-finish straight.
Suzuka: One DRS zone, same as last year.
India: Two DRS zones, same as last year.
Abu Dhabi: Two DRS zones, same as last year.
USA: DRS zone added on the start-finish straight.
Brazil: DRS zone added on the start-finish straight.