Samut Songkhram (Thai: สมุทรสงคราม, pronounced [sā.mùt sǒŋ.kʰrāːm]) is one of the central provinces (changwat) of Thailand.
Neighbouring provinces are (from the south clockwise) Phetchaburi, Ratchaburi and Samut Sakhon. Local people call Samut Songkhram Mae Klong. The province is the smallest of all Thai provinces areawise. Chang and Eng Bunker, the famous Siamese twins were born here.