Frauenfeld District is one of the five districts of the canton of Thurgau, Switzerland. It has a population of (as of ). Its capital, and the capital of Thurgau, is the city of Frauenfeld. The district shares borders with canton Zurich and canton Schaffhausen as well a river border with the German enclave of Büsingen am Hochrhein.
The district contains the following municipalities: