| Official Name: | Loei |
| Other Name: | เลย |
| Pushpin Map: | Thailand |
| Settlement Type: | Town |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Provinces |
| Subdivision Name1: | Loei province |
| Subdivision Type2: | District |
| Subdivision Name2: | Mueang Loei district |
| Subdivision Type3: | Subdistrict |
| Subdivision Name3: | Kut Pong |
| Population: | 21,013 |
| Population As Of: | 2017 |
| Population Density Km2: | auto |
| Coordinates: | 17.4853°N 101.7303°W |
| Elevation M: | 253 |
| Timezone: | ICT |
| Utc Offset: | +7 |
Loei (; in Thai pronounced as /lɤ̄ːj/) is a town (thesaban mueang) in northeast Thailand. Loei covers the whole tambon of Mueang Loei district and is the capital of Loei province. In 2017, Loei had a population of 21,013. Loei lies 545 km north-northeast of Bangkok, 150 km west of Udon Thani.
Loei is in the fertile valley of the Loei River, which runs from south to north through the eastern part of the town. A range of hills lies to the east, including Phu Bo Bit Forest Park,[1] about 3km (02miles) from the town centre.
Loei has a tropical savanna climate (Köppen climate classification Aw). Winters are quite dry and very warm. Temperatures rise until April, which is hot with the average daily maximum at 36°C. The monsoon season is from late April to October, with heavy rain and somewhat cooler temperatures during the day, although nights remain warm.
Route 201 leads from Chiang Khan in the north on the border with Laos, through Loei, to Non Sa-at near Chum Phae. Route 203 leads west to the vicinity of Phu Ruea, and then turns south to Lom Sak.
Loei is served by Loei Airport.[2]