History
''Mueang Nakhon Nayok'' is an ancient city. In the Ayutthaya kingdom it was the eastern frontier city. The historians found the old city wall on three sides, the southern side was protected by the Nakhon Nayok River as a natural city wall. The district was called Wang Krachom as the office was in Tambon Wang Krachom, on the left bank of the Nakhon Nayok River. In 1896 the government moved the district office to the right bank of the river. The district office was moved to the old provincial court building in 1931. A new district office was opened on 18 January 1953. The district name was changed to Mueang Nakhon Nayok on 1 January 1939, to correspond with the name of the province. On 1 January 1943, the government downgraded Nakhon Nayok Province and combined it with Prachinburi province, except Ban Na district, Ban Na which became part of Saraburi province. During that time the district was called Nakhon Nayok District. On 9 May 1946, the government re-established Nakhon Nayok Province, thus the district was renamed Mueang Nakhon Nayok.Geography
Neighboring districts are (from the southwest clockwise) Ongkharak district, Ongkharak, Ban Na district, Ban Na of Nakhon Nayok Province, Kaeng Khoi district, Kaeng Khoi, Muak Lek district, Muak Lek of Saraburi province, Pak Chong district, Pak Chong of Nakhon Ratchasima province, Pak Phli district, Pak Phli of Nakhon Nayok Province and Ban Sang district, Ban Sang of Prachinburi province. The Sankamphaeng Range mountainous area is in the northern section of this district. The Nakhon Nayok River and Khlong Tha Dan are important water resources.Education
* Chulachomklao Royal Military Academy is Phrom Mani Subdistrict, Mueang Nakhon Nayok District.Administration
The district is divided into 13 sub-districts (''tambons''), which are further subdivided into 125 villages (''mubans''). The town (''thesaban mueang'') Nakhon Nayok City, Nakhon Nayok covers ''tambon'' Nakhon Nayok and parts of Tha Chang, Ban Yai, Wang Krachom, and Phrom Ni. Tha Chang is a township (''thesaban tambon'') which covers parts of ''tambon'' Tha Chang. There are a further 12 tambon administrative organizations (TAO).References
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