Mueang Sukhothai (Thai: เมืองสุโขทัย, pronounced [mɯ̄a̯ŋ sù.kʰǒː.tʰāj]) is the capital district (amphoe mueang) of Sukhothai province, northern Thailand.

Neighboring districts are (from the southeast clockwise) Kong Krailat, Khiri Mat, Ban Dan Lan Hoi and Si Samrong of Sukhothai Province and Phrom Phiram of Phitsanulok province.

The important water resource is the Yom River.

Originally named Mueang as the capital district of Sukhothai Province, in 1917 the district was renamed Thani (ธานี).^[1] In 1932, the province Sukhothai was abolished and merged into Sawankhalok Province.^[2] In 1939 the province was renamed Sukhothai, and the district, by then named Sukhothai Thani (สุโขทัยธานี) was renamed Mueang Sukhothai.^[3]

The district is divided into 10 sub-districts (tambons), which are further subdivided into 98 villages (mubans). The town (thesaban mueang) Sukhothai Thani covers tambon Thani. There are a further two sub-district municipalities (thesaban tambon): Ban Suan and Mueang Kao, each covering parts of the same-named tambons. There are a further nine tambon administrative organizations (TAO).