| Official Name: | Samko |
| Native Name: | สามโก้ |
| Native Name Lang: | th |
| Settlement Type: | Amphoe |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Ang Thong |
| Subdivision Type2: | Tambon |
| Subdivision Name2: | 5 |
| Subdivision Type3: | Muban |
| Subdivision Name3: | 37 |
| Seat Type: | Seat |
| Established Title: | Amphoe established |
| Population Total: | 19314 |
| Population As Of: | 2012 |
| Population Density Km2: | auto |
| Area Total Km2: | 95.4 |
| Postal Code Type: | Postal code |
| Postal Code: | 14160 |
| Blank Name Sec1: | Geocode |
| Blank Info Sec1: | 1507 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 14.6056°N 100.2447°W |
Samko (in Thai pronounced as /sǎːm.kôː/) is the district (amphoe) in the western part of Ang Thong province, central Thailand.
The district was separated from Wiset Chai Chan district to become a minor district (king amphoe) in 1962.[1] It was upgraded to full district in 1965.[2]
Neighboring districts are (from the north clockwise) Pho Thong and Wiset Chai Chan of Ang Thong Province and Si Prachan of Suphanburi province.
The district is divided into five sub-districts (tambon) and 37 administrative villages (muban). The sub-district municipality (thesaban tambon) Samko covers the tambon Samko, Ratsadon Phatthana, and Mongkhon Tham Nimit. Op Thom and Pho Muang Phan have a tambon administrative organization as their local government.
| No. | Name | Thai | Villages | Pop.[3] | |
|---|---|---|---|---|---|
| 1. | Samko | สามโก้ | 10 | 5,078 | |
| 2. | Ratsadon Phatthana | ราษฎรพัฒนา | 6 | 2,599 | |
| 3. | Op Thom | อบทม | 6 | 4,056 | |
| 4. | Pho Muang Phan | โพธิ์ม่วงพันธ์ | 7 | 4,417 | |
| 5. | Mongkhon Tham Nimit | มงคลธรรมนิมิต | 8 | 3,164 |