In relative terms, the US has the highest number of guns per capita. There were an estimated 89 to 100 guns for every 100 Americans in 2013–around one firearm per person.

How many people own guns in America?
Answering this requires a more nuanced look at the gun ownership. Only a quarter of Americans own guns, according to numbers from General Social Survey and Gallup in 2013. This means that many American gun owners have more than one gun.

How many guns does an average American gun owner possess?

The average American gun owner owns three guns, according to a 2015 survey conducted by Harvard and Northwestern University. More than a half of them own just one or two, whereas 14% of them–7.7 million or 3% of the US population–own anywhere between eight to 140 guns. This 3% of the population owns half of the civilian guns in the US.

So owning 8 might set you apart somewhat. Owning 3, 4, or 5 probably makes you average.