According to Wikipedia 0.17% of the population of the country is homeless on any given night. Given that statistic and Boulder's population of 107000, if we were average there would be approximately 180 people homeless. The numbers below show around 280 homeless are sheltered in the 3 shelters available or about 50% higher than the national average. This doesn't count homeless "camping out" but that number is probably not that high in the winter though in summer we do see an influx of "travelers".