This list, from Transparency International, attempts to list almost all the world's nations in terms of corruption. The US is tied for 19th with Uruguay (the highest-rated Latin American nation). We are just behind Japan and just ahead of Ireland.
Looking further down the list, I found the two countries I've lived in recently -- the Philippines (94th) and, just behind them, Ecuador at 102nd. I would have expected Ecuador to do a little bit better (at least relative to the Philippines).
Given that there are 177 countries on the list, these two would seem to have not terrible ratings -- lower middle. But the bottom of the list consists of some of the most horrible places on earth, and really, anything outside the top fifty or so is not a place most folks would like to live (or invest). Hell, Rwanda managed to make it to 49th.