| Official Name: | Mueang Nakhon Nayok |
| Native Name: | เมืองนครนายก |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Nakhon Nayok |
| Subdivision Type2: | Seat |
| Subdivision Type3: | Subdistrict |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Area Total Km2: | 728.1 |
| Population Footnotes: | [1] |
| Population Total: | 101,897 |
| Population As Of: | 2023 |
| Population Density Km2: | 140 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 14.2036°N 101.2172°W |
| Postal Code Type: | Postal code |
| Postal Code: | 26000 |
| Area Code Type: | Calling code |
| Area Code: | 037 |
| Iso Code: | TH-2601 |
Mueang Nakhon Nayok (th|เมืองนครนายก, pronounced as /th/) is the capital district (amphoe mueang) of Nakhon Nayok province, central Thailand.
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 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.
Neighboring districts are (from the southwest clockwise) Ongkharak, Ban Na of Nakhon Nayok Province, Kaeng Khoi, Muak Lek of Saraburi province, Pak Chong of Nakhon Ratchasima province, Pak Phli of Nakhon Nayok Province and 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.
The district is divided into thirteen subdistricts (tambons), which are further subdivided into 125 villages mubans).[1]
| No. | Subdistricts | Thai | Villages | Pop. | |
|---|---|---|---|---|---|
| 1. | นครนายก | - | 7,613 | ||
| 2. | Tha Chang | ท่าช้าง | 13 | 7,944 | |
| 3. | Ban Yai | บ้านใหญ่ | 7 | 7,776 | |
| 4. | Wang Krachom | วังกระโจม | 7 | 4,463 | |
| 5. | Tha Sai | ท่าทราย | 7 | 3,393 | |
| 6. | Don Yo | ดอนยอ | 7 | 4,878 | |
| 7. | Si Chula | ศรีจุฬา | 12 | 5,876 | |
| 8. | Dong Lakhon | ดงละคร | 13 | 8,119 | |
| 9. | Si Nawa | ศรีนาวา | 8 | 5,325 | |
| 10. | Sarika | สาริกา | 12 | 10,969 | |
| 11. | Hin Tang | หินตั้ง | 9 | 5,752 | |
| 12. | Khao Phra | เขาพระ | 13 | 9,269 | |
| 13. | Phrommani | พรหมณี | 17 | 19,544 | |
| Total | 125 | 101,897 |
As of December 2023 there are: two municipalities (thesaban), of which Nakhon Nayok itself has town status (thesaban mueang) and covers subdistrict Nakhon Nayok and parts of Tha Chang, Ban Yai, Wang Krachom and Phrommani subdistricts. Tha Chang subdistrict municipality (thesaban tambon) covers part of the subdistrict. There are further twelve subdistrict administrative organizations - SAO (ongkan borihan suan tambon -o bo to)[1] [2]
| Nakhon Nayok town municipality | Pop. | website | |
| Nakhon Nayok | 7,613 | ||
| Tha Chang | 1,963 | ||
| Ban Yai | 3,334 | ||
| Wang Krachom | 1,726 | ||
| Phrommani | 976 | ||
| Total | 15,585 |
| Subdistrict adm.org.-SAO | Pop. | website | |
|---|---|---|---|
| Phrommani | 19,544 | ||
| Sarika | 10,969 | ||
| Dong Lakhon | 8,119 | ||
| Khao Phra | 9,269 | ||
| Si Chula | 5,876 | ||
| Hin Tang | 5,752 | ||
| Si Nawa | 5,325 | ||
| Tha Chang | 4,941 | ||
| Don Yo | 4,878 | ||
| Ban Yai | 4,442 | ||
| Tha Sai | 3,393 | ||
| Wang Krachom | 2,737 |