Masarautar Thonburi babbar masarauta ce ta Siamese wacce ta wanzu a kudu maso gabashin Asiya daga 1767 zuwa 1782, wacce ke kewaye da birnin Thonburi, a cikin Siam ko Thailand ta yau.Taksin mai girma ne ya kafa Masarautar, wanda ya sake hada Siam bayan rugujewar masarautar Ayutthaya, wacce ta raba kasar zuwa jahohi biyar masu fada da juna.Masarautar Thonburi ta kula da saurin sake haɗewa da sake kafa Siam a matsayin babban ƙarfin soja a cikin yankin kudu maso gabashin Asiya, yana kula da faɗaɗa ƙasar zuwa mafi girman yankinta har zuwa wannan lokacin a cikin tarihinta, wanda ya haɗa da Lan Na, masarautun Laotian (Luang Phrabang, Vientiane). , Champasak), da Cambodia a ƙarƙashin tasirin Siamese.^[54]A zamanin Thonburi, farkon yawan shige da fice na kasar Sin ya fada hannun Siam.Ta hanyar samun ma'aikatan kasar Sin, kasuwanci, noma da masu sana'a sun bunkasa.Koyaya, dole ne a murkushe tawayen China na farko.Duk da haka, daga baya saboda damuwa da abubuwa da yawa, Sarki Taksin ya sami raunin hankali.Bayan juyin mulkin da ya kawar da Taksin daga kan karagar mulki, Janar Chao Phraya Chakri ya dawo da kwanciyar hankali, wanda daga baya ya kafa Masarautar Rattanakosin , daula ta hudu kuma mai mulki a Thailand.