Mueang Nakhon Si Thammarat (Thai: อำเภอเมืองนครศรีธรรมราช, pronounced [mɯ̄a̯ŋ ná(ʔ).kʰɔ̄ːn sǐː tʰām.mā.râːt]) is the capital district (amphoe mueang) of Nakhon Si Thammarat province in southern Thailand.

Neighboring districts are (from the southeast clockwise): Pak Phanang, Chaloem Phra Kiat, Phra Phrom, Lan Saka, Phrom Khiri and Tha Sala.

The missing numbers 9-11 and 17 belong to communes which were split off in 1994 to form Phra Phrom District.

Nakhon Si Thammarat itself has city status (thesaban nakhon) and covers tambons Nai Mueang, Tha Wang, Khlang, and parts of Na Khian and Pho Sadet.

This Nakhon Si Thammarat Province location article is a stub.