Thung Khru is one of the 50 districts (khet) located in Bangkok, Thailand. It serves as a primary administrative subdivision within the capital city.
The district is geographically bounded by several neighboring areas. To its north and west, it borders the Rat Burana District of Bangkok. Its eastern boundaries are shared with Amphoe Phra Pradaeng and Amphoe Phra Samut Chedi in Samut Prakan province, while its southern borders meet the Bang Khun Thian and Chom Thong districts of Bangkok.