| Official Name: | Phatthana Nikhom |
| Native Name: | พัฒนานิคม |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Lopburi |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Phatthana Nikhom |
| Subdivision Type3: | Tambon |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 61306 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 15140 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 1602 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 14.8558°N 100.99°W |
Phatthana Nikhom (Thai: พัฒนานิคม, in Thai pronounced as /pʰát.tʰā.nāː ní(ʔ).kʰōm/) is a district (amphoe) of Lopburi province in central Thailand.
Neighboring districts are (from the north clockwise) Chai Badan and Tha Luang of Lopburi Province, Muak Lek, Wang Muang, Kaeng Khoi, Chaloem Phra Kiat and Phra Phutthabat of Saraburi province, and Mueang Lopburi and Khok Samrong of Lopburi.
The Pa Sak Cholasit Dam that stops the Pa Sak River is in this district. Phatthana Nikhom is a favorite tourist stop due to its winter sunflower fields.
The district was created during the premiership of Field Marshal Plaek Phibunsongkhram.
The minor district (king amphoe) was created on 23 February 1962, when the five tambon Di Lang, Manao Wan, Khok Salung, Chong Sarika, and Nong Bua were split off from Mueang Lopburi district.[1] It was upgraded to a full district on 16 July 1963.[2]
The district is divided into nine sub-districts (tambons), which are further subdivided into 88 villages (mubans). There are two townships (thesaban tambon): Phatthana Nikhom covering parts of tambons Phatthana Nikhom and Kaeng Suea Ten covering parts of tambon Nong Bua. There are a further nine tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Phatthana Nikhom | พัฒนานิคม | 14 | 12,293 | ||
| 2. | Chong Sarika | ช่องสาริกา | 13 | 6,770 | ||
| 3. | Manao Wan | มะนาวหวาน | 7 | 4,235 | ||
| 4. | Di Lang | ดีลัง | 7 | 7,220 | ||
| 5. | Khok Salung | โคกสลุง | 11 | 11,150 | ||
| 6. | Chon Noi | ชอนน้อย | 6 | 2,529 | ||
| 7. | Nong Bua | หนองบัว | 11 | 6,014 | ||
| 8. | Huai Khun Ram | ห้วยขุนราม | 11 | 6,818 | ||
| 9. | Nam Sut | น้ำสุด | 8 | 4,277 |