| Lemhi County Airport | |
| Iata: | SMN |
| Icao: | KSMN |
| Faa: | SMN |
| Type: | Public |
| Operator: | Lemhi County |
| Location: | Salmon, Idaho |
| Elevation-F: | 4,043 |
| Elevation-M: | 1,232.3 |
| Pushpin Map: | USA Idaho |
| Pushpin Map Caption: | Location in Idaho |
| Pushpin Label: | SMN |
| Pushpin Label Position: | right |
| R1-Number: | 17/35 |
| R1-Length-F: | 5,510 |
| R1-Length-M: | 1,679 |
| R1-Surface: | Asphalt |
Lemhi County Airport is a public airport located four miles (6 km) south of the central business district (CBD) of Salmon, a city in Lemhi County, Idaho, USA. The airport covers 259acres and has one runway.