| Iwai Station | |
| Style: | JR East |
| Native Name: | 岩井駅 |
| Native Name Lang: | ja |
| Address: | Ichibu 146-2, Minamibōsō-shi, Chiba-ken 299-2226 |
| Country: | Japan |
| Operator: | JR East |
| Line: | Uchibō Line |
| Distance: | 73.7 km from |
| Platforms: | 1 island platform |
| Status: | Staffed |
| Opened: | August 10, 1918 |
| Passengers: | 244 |
| Pass Year: | FY2019 |
| Map Type: | Japan Chiba Prefecture#Japan |
| Map Dot Label: | Iwai Station |
is a passenger railway station in the city of Minamibōsō, Chiba Prefecture, Japan, operated by the East Japan Railway Company (JR East).
Iwai Station is served by the Uchibō Line, and is located 73.7 km from the western terminus of the line at Soga Station.
The station is an at-grade station with a single island platform connected to the station building by a footbridge. The station is staffed.
Iwai Station was opened on August 10, 1918. The station was absorbed into the JR East network upon the privatization of the Japan National Railways (JNR) on April 1, 1987.
In fiscal 2019, the station was used by an average of 244 passengers daily (boarding passengers only).[1]