This study reports the perceptions and attitudes of geography teachers towards biotechnology and genetically-modified (GM) foods in Turkey. A survey was conducted with secondary school geography teachers attending teacher workshops in various parts of the country in 2008 and was responded to by 78 teachers from 31 different provinces. The study not only revealed important results about the perceptions of geography teachers towards biotechnology and GM foods but also provided an understanding of the current perceptions of the public towards these two fields in the country. The study revealed that teachers did not have enough information about biotechnology and GM foods. This lack of knowledge played an important role in determining teachers’ perceptions and attitudes towards these two fields. The majority of teachers supported the use of biotechnology for disease treatment and medicine production. However, their support declined very sharply with regard to cloning human cells, producing GM foods, and cloning animals. General attitudes of teachers to GM foods were mainly negative. The majority of teachers thought that GM foods were risky for human health and the environment. This negative attitude of teachers towards GM foods is likely to continue until the public becomes better informed about biotechnological applications and the positive outcomes of producing GM foods.