Rio Grande is a large city in northern Hakkou. It has a large harbor and the city is surrounded by Rio Grande Ridge. Most suburban and urban developments are below this ridge, though Valleyview Estates houses the largest manors of the aristocrats of Rio Grande and is on the ridge looking north. This is where O'Brien Manor is situated.
Rio Grande is the capital of Grande Re province and is the largest city in the province.
There are many schools in Rio Grande, and a few colleges. The only one mentioned by name so far in Now and Forever is Rio Grande Valley Academy, though Arcanine Royale has stated that more are to be mentioned.