Nakhon Ratchasima (da Thai: นครราชสีมา) birni ne, da ke a yankin Nakhon Ratchasima, a ƙasar Thailand. Bisa ga ƙidayar jama'a a shekarar 2017, Nakhon Ratchasima tana da yawan jama'a 444,023. An gina birnin Nakhon Ratchasima a karni na sha bakwai bayan haihuwar Annabi Issa.