'on the island' vs 'in the island'

[marenparn]

Both are used, but is one of them preferred over the other, or grammatically more correct?

'on the island' or 'in the island'

 

[cclaff]

Both are used, but is one of them preferred over the other, or grammatically more correct?

'on the island' or 'in the island'

Only "on the island" is correct.