| Attapeu | |
| Native Name Lang: | lo |
| Settlement Type: | District & municipality |
| Official Name: | Samakkhixay District |
| Pushpin Map: | Laos |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Laos |
| Subdivision Type: | Country |
| Subdivision Type1: | Admin. division |
| Subdivision Name1: | Attapeu province |
| Established Title: | Founded |
| Established Date: | 1560 |
| Population As Of: | 2015 |
| Population Footnotes: | [1] |
| Population Total: | 33,700 |
| Population Density Km2: | auto |
| Population Blank1 Title: | Ethnicities |
| Population Blank2 Title: | Religions |
| Population Blank2: | Buddhism |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 14.82°N 106.8206°W |
| Elevation M: | 93 |
Attapeu (Lao: ອັດຕະປື, in Lao pronounced as /ʔát.tā.pɯ̀ː/), also written as Attopu or Attapu, is the capital of Attapeu province, Laos. Its official name is Muang Samakhi Xay. It is the southernmost of provincial capitals in Laos.
Most of the inhabitants are Lao Loum. The temple of Wat Luang Muang Mai in the town centre was built in 1939 and is notable for original naga barge boards. A monument dedicated to Kaysone Phomvihane was erected near the temple.
Attapeu International Airport is about from Attapeu.[2] The airport opened in May 2015 but did not receive flights until April 2016, when Lao Airlines introduced flights from Vientiane via Pakse.[3] However, the airline withdrew from the market in October 2016 due to low demand.[4] TTR Weekly attributed the airport's condition to the lack of nearby tourist attractions, even though commercial activity has risen due to Attapeu's proximity to Vietnam.[5]