Uthumphon Phisai
อุทุมพรพิสัย | |
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 District location in Sisaket province | |
| Coordinates: 15°6′42″N 104°8′24″E / 15.11167°N 104.14000°E | |
| Country | Thailand |
| Province | Sisaket |
| Seat | Kamphaeng |
| Area | |
| • Total | 407.9 km2 (157.5 sq mi) |
| Population (2005) | |
| • Total | 109,618 |
| • Density | 268.7/km2 (696/sq mi) |
| Time zone | UTC+7 (ICT) |
| Postal code | 33120 |
| Geocode | 3310 |
Uthumphon Phisai (Thai: อุทุมพรพิสัย, pronounced [ʔù.tʰūm.pʰɔ̄ːn pʰí.sǎj]) is a district (amphoe) in the western part of Sisaket province, lower northeastern Thailand.