
For Coin shows it sometimes is not to easy to find them all. Usually the first place I would look is Google and type in coin shows and your State. However, that sometimes doesn't show them all. There are lists of them also available with coin magazines such as
Coin World, Numismedia, etc. Again, those too are not always complete. Another thing I've done to find them is to use Google to find local Coin Clubs since they too sometimes have coin shows that just don't make the other listings. And too if there are any coin stores or hobby stores in your area you may want to stop in and ask them if there are any local coin shows. For example by me there are numerous coin stores that have people at all the local coin shows so they really know where and when.