- Delfino Airstrip: 1
- Delfino Plaza: 19
- Bianco Hills, Gelato Beach, Ricco Harbor, Pinna Park, Noki Bay, Sirena Beach, Pianta Village: 30
- Corona Mountain: 10
Total of 240. Sorry, no way to find out how many are left, but you can see how many blue coins you have collected in an area by pressing the Z button and selecting a level on the map. The amount of blue coins collected in that area is shown at the bottom right. Unfortunately, Delfino Plaza does not show this tally.
Source(s)
