| New Semnan Airport | |
| Icao: | OI21 |
| Pushpin Map: | Iran |
| Pushpin Map Caption: | Location of airport in Iran |
| Pushpin Label: | OI21 |
| Pushpin Label Position: | right |
| Type: | Public |
| Owner: | Government of Iran |
| Operator: | Iran Airports Company |
| Location: | Semnan, Semnan Province, Iran |
| Metric-Elev: | y |
| Elevation-M: | 1,115 |
| Coordinates: | 35.3889°N 53.6719°W[1] |
| Metric-Rwy: | y |
| R1-Number: | 06/24 |
| R1-Length-M: | 3,578 |
| R1-Surface: | Asphalt |
| Footnotes: | Source: World Aero Data[2] |
New Semnan Airport is an airport serving the city of Semnan, in the Semnan Province of Iran. It is located within the Semnan Air Defense Base and is mainly used for military purposes. In particular, it features the Islamic Republic of Iran's most active pilot training and simulation facilities.[3] The facility also includes an aerospace research center.[3]