The Friday File: America is clearly aging. The most popular beer in the US in 2017 was Bud Light with a 15.4% market share, down sharply from 16.2% a year earlier. Number two was Coors Light with a 7.6% market share, down from 7.9% in 2016, followed by Miller Light at 6.3%, down from 6.4% in 2016. Budweiser is in fourth spot with 6.2%, down from 6.6% a year earlier.