To answer the OP's question. On the IHG web site there is no way (that I have ever found). If you leave the city out it will ask you to pick a city before it moves on to show the hotels. I don't know about 3rd party web sites but I have never seen this capability anywhere before. Some will ask for a within how many miles but most I have seen is 50 miles but you still have to select a city. If the entire state is within that many miles then I guess it would show them all but how many states are that small?