The City of Green Bay's population was just over 31,000, making the Packers the second smallest town to have an NFL franchise, next to only Tonawanda (see below). The Packers had to play almost exclusively on the road in larger cities where attendance could be expected to give a better count at the gates, thus giving the Green Bay team a larger cut in revenue than they could expect at home.
The 1921 season was shakey at best for the franchise as games were scheduled weekly by the home teams, who predominantly scheduled opponents by what attendance they could expect to draw.
The Packers are still in the smallest NFL market, but their fan base is one of the more popular teams of fans around the world.