There are hamster shows each year in the US, and you should check out your local network to find details.
However, it has to be said that the concept of the hamster club/society is still in its infancy in the US, compared to the UK. The biggest society in the country is the California Hamster Association, and there is also an Internet Hamster Association of North America (IHANA).
Cute hamster? Let's hope the judges agree!
If there are any shows in your neighborhood, you could consider helping out. And if you know of other enthusiasts in your county or wider State, why not set up a local group yourself?
It's also worth checking out the oldest hamster club in the world - the National Hamster Council, based in the UK. They have lots of advice and inspiring content.