Wallet Hub released a study looking at 182 cities to determine which were the happiest nation. The site looked at three dimensions - 1) Emotional & Physical Well-Being, 2) Income & Employment and 3) Community & Environment and a total of 31 different factors to help them determine the happiest cities.
Denver, Aurora and Colorado Springs all cracked the Top 100. Plano, Texas came in at #1 and Detroit, Michigan ranked dead last at #182. You can see the full study here.