نهر تشاو فرايا
Thon Buri (, ) is one of the 50 districts ("khet") of Bangkok, Thailand. On the west bank of Chao Phraya River, it was once part of Thon Buri Province. Neighboring districts are (from north clockwise) Bangkok Yai, Phra Nakhon (across Chao Phraya River), Khlong San, Bang Kho Laem (across Chao Phraya), Rat Burana, Chom Thong, and Phasi Charoen.