Translation:The Norwegian population is quite small.
Is 'populace' a valid translation for 'befolkning'? I tried it here and it was rejected.
It doesn't sound right. Only a "population" can be a number, not a "populace," despite being similar otherwise.
"The population of Norway is quite small" would be the way most say it. Otherwise, like someone mentioned below, it sounds like the people of norway are small
It doesn't sound natural in English. It sounds like you're talking about the height of everyone, and that's certainly not the case :D