Of Interest - Osan Air Force Base, foreign restaurants, stores with foreign goods
Lodging - several hotels near the main gates of the air force base
Tourist Office - no
Nearest Int'l ATM - I would think there would be one nearby, but I don't where
Most people coming to my site from a google search are looking for Osan. While Osan is a nice little town, I don't think that is what they are looking for. I think they really want to go to Osan Air Force Base which is one subway stop to the south in Pyeongtaek.
To the west of the station is Osan Air Force Base. To the east is the town of Songtan.
The Air Force Base is a fifteen to twenty minute walk from the station. Follow the signs (in English). Between the station and the base are a wide variety of small shops and restaurants, many that serve foreigners, not just Americans. The last time I was there, I ate at a Pakistani restaurant that had an almost entirely Pakistani clientele.
The town of Songtan is a typical suburban town. The area is more modern looking and the buildings are generally bigger than those near the base.
Songtan is on line 1 of the Seoul subway, but I wouldn't go all the way from Seoul on the subway. Take the train to Pyeongtaek and then change. That is usually the quickest way whether you are coming from the north or south. Some trains do stop in Osan, but not many. The nearest KTX stop is at Cheonan-Asan. Go to Asan subway station to change for these trains if you are going to south to Daejeon, Daegu, or Busan. It will probably not save you time to take the KTX to Seoul. Asan is near the end of line 1, and not all subway trains go that far. Only trains that say they are going to Sinchang will go stop at Asan.