There are even smaller nations that compete internationally today, like Sealand(550 square meters), which has more athletes than residents(their soccer team lives in Kentucky). I actually wouldn’t be surprised if Sealand got in the Olympics. They already have 2 silver medals from the World Cup of Kung Fu!
Edit: random rings added to Death’s dress the next day
MORE edit: Kenny’s ear twitch added.
Edit number 3: Note about the internetes has been added.