Samut Prakan is located next to Bangkok. The north borders Bangkok and Chachoengsao, the east borders Chachoengsao, the south is the Gulf of Thailand, and the west is Bangkok,
The geography is all flatland and plains with the Chao Phraya River running through the city on its way to the Gulf of Thailand. Its coast is 47.5 kilometers long. Samut Prakan, Thailand, is known as the province of industry, fishing, and agriculture.