The 65-year-old German, who has also coached East Germany and Iraq, will replace Radojko Avramovic, who retired after Singapore lifted Southeast Asia's Suzuki Cup in December.
"While I recognise that the task ahead will not be easy, I am confident and I believe my experience at the international level and contacts in the game will be an asset to Singapore football," Stange said in a statement.
Singapore are 165th in the FIFA world rankings.
- Sports & Recreation
- Radojko Avramovic